DIGITAL NOISE E L IMINATOn

SN-O OWNERS MANUAL

--

Q

A ATTENTION HISOlJE DE CHOC ElEtlM EPAS OUllAoFI

CAUTION TO REDUCE THE RISK OF ELECTRI C SHOCK

DO NOT REMOVE COV R (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO OUALIFIED SERVICE PERSONNEL

A T e lightning flash with arrowhead symbol lIhln an equllal shy

ral Inangle IS inlended 10 alen the user to the presence 01

unlnsulated dangerous voltagemiddot wIthin the producl S enrlomiddot sure Ihal may be 0 1 suti lclenl magnilude 10 con IItule a rosk 01 Icc ric shock 10 persons

Ttl exclamallo poonl wi n an equtla leral lrianglo is Intended 10 lert Ih Usr 10 the presence 0 1 importan l operating and Olamlenance (sorvlclng Instructions in the rtleratureaccompashyIng Ihe product

Than inclu( live f

read

INSTRUCTIONS PERTAINING TO A RISK OF FIRE ELECTRIC SHOCK OR INJURY TO PERSONS FEA

IMPORTANT SAFETY INSTRUCTIONS ca n reSAVE THESE INSTRUCTIONS vanabl WARNING - When using electnc products bas ic procaut ions should alw ys be followed including the following

rlcktd

1 Read all the instruct ions before using the product 8 The power-supply cord of Ihe producl shOuld be unplugged from Ihe oullel when lell unused for a long period of lime 2 Do not use th is product near water - for example near a li ve rt

bathtub washbowt kllcllen sink in a wet basemen t or near a 9 Care should be taken so Ihal objecls do nollall and liquids are

sWimming pool or the like not spi lled inlo the enclosure th rough openings

10 The produc l should be serviced by qualified service personnel n the3 This producl should be used only w llh a cart or sland Ihat IS when recommended by Ihe manufacturer bands A The powe r-supply cord or Ihe plug has been damaged or 4 ThiS produCI either atone or in combinalton with an amplil ler frequt l B ObJecl s tave lallen or liquid has been spilled on lo Ihe

sound levels Ihal could cause permanenl hearing loss Do nol and headphones or speakers may be capable of producmg

producl or Ihe noi

operale for a long period of lime al a high volume level or al a C The producl has been exposed to rain or

levelltlal is uncomfortable If you experience any hearing loss D The produCI does nol appear 10 opera Ie normally or The hexhibilS a marked change in performance or or ringing in the ears you should consult an audiologl t

E The product has been dropped or Ihe enclosure damshy allerali5 The producl should be localed so Ihat ils localion or pOSllion aged does nol in lerfere wilh its proper venlilalion surply

11 Do nol allempllo service Ihe product beyond thai described In 6 The produci shou ld be localed away from heal sources sucll as delec liIhe user-mainlenance inslructions All other servicing should ra dialors heal regislers or olher producls thai produce h al be referred to qualified service personnel

7 The producl should be connecled 10 a power supply only of Ihe Iype described in the operaling inslrucltonsor as marked on the Ow ing produc adjustr

For Ihe USA

ThiS product may be eqUipped Wllh a pol ri led lin plug (one blade wider Ihan Ihe olher ) ThiS is a sa lety feature If you are unable 10 Insert the plug into the outlel con lacl an elecl riclan 10 re~ lace your obsolele outlet Do nol defeal lhe safely purpose of Ihe plug

For Canada co~ For Polari zed Une Pl ug

CAUTION TO PR VENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY INSERT Impor

ATENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODU IRE LA LAME LA PLUS LAR GE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU FON D

bull SIrUCI

bull Pan elFor Ihe UK

WARNING THE APPARATUS MUST BE EflRTHED

IMPORTANT THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLIOWING CODE GREEN-AND-Y LLOW EARTH BLU E NEUTRAL BROWN LIV E

As Ihe co lours ollhe wires in Ihe mains lead of Ihis apparalus may nol correspond wi lh Ihe coloured markings Identllytng Ihe lerminals in your plug proceed as lo llows

The wire which is coloured GREEN-ANO-YELLOW musl be connecled 10 Ihe lerminal in Ihe plug which is marked by Ihe leiter

E Or by Ihe safely earth symbol orcoloured GREEN or GREENmiddotAND YELLOW The wire which is coloured BLUE must be connecled 10 Ihe lerminal which is marked wilh Ihe leller N or coloured BLACK The wire which IS coloured BROWN must be connecled 10 Ihe lerminal which is marked wi lh Ihe leller L or coloured RED

The producl wh ich is equipped wllh a THR EE WIRE GROUNDING TYPE LINE PLUG muSI be rounded

ulla shyCO 0 1

ncloshy15k 0 1

Thank you for purchasing the Roland SN-550 Digital Noise Eliminator The SN-550

nded includes both noise and hum canceling units that can effectively reduce noise during I and mpashy

live performances and studio recordings read this owners manual carefully

To make the best use of this device please

FEATURES

1ged e

-i are

The S SSO includes both noi ( an d hum canccling units which

can Ieduce Ihe noise generated by mu sical insllumen ls o r

va riabl e lighling sys lems Ih e hum caused by power suppli c or

pi c ~cd up by mi croph ones an d guitars Ihe lape h i s~ of anal ug

reco rding equi pmenl elc II can therefore be eflccli e ly lI sed in

liv e pe rfo lmance or sludio reco rdlll g s ilu ali ons

d or ) Ihe

In Ih e noise ca nceling uni Ih e input s ign al is di vided into fi ve

bands Thi s makes it possible to reduce Ihe noise in a sp ec ific

fre quenc y range o f each band th ere fore effec ti ve ly removing

th e noi se from the input signal

Iy or

jam-

ad In lould

The hUIll canceling ullit remo ves hum with minimal tonal

alt e ration It effec tiv ely removes the hum caused by po we r

suppl y line s With an auto mati c pow er suppl y frequ ency

detectin g system

bull Uwing to th e lat es t s ign al process ing

ad justm ent s con be made quickl y and easily

lechoology fin e

The 1 -550 features a moni to ring funcl lon that all ows yo u to

monitor Ih e noise and hum ca nceli ng opern tions

An intemal leve l-contro llin g sys tem is used to adjusl Ih e signal

without affec tin g the input o r out pUt le ve l

The Sl middot550 has two comp letely ind epe ndent channels fo r signal

processi ng and there fo re can be connected to a ste reo s() und

source or two mono sound so urces with dilT rent settings fo r

eac h source

Both 14 inch phone and XLR balanced connectors are provided

for in put and output so that the S 550 call be useJ wi th variougt

types of devices

Anal g circui ts arc con truc lcd Wit h di screte systems al al l

stages to ensure high quality sound

The SN-550 features a bYPJs (ono ff) swilch When thi s

sw itch is turned on the inpu t Signal will be ou tput without

passing th rough th e internal circuits

CONTENTS

4bull Imponant Jotes bull Conn ec ti ons middotmiddot middotmiddot9

bull S truclure of th S-J -550middot middot middot bull Setllngs middot middot 11

bull Panel Desc ription 6 bull Spec ifications 12

Copyright copy 990 by ROLAND CORPORATION

All rights rese rved No part of this publicat ion ma y be reproduced in

any fo rm without the written permission of ROLAND CORPORATION

3

IMPORTANT NOTES

MPORTANT NOTES In IJ dilion 10 Ihe Hems lisled under Safety Pre ca utions on page 2

plcase read and ad here to the follow ing

[Power Supply]

bull Wilen nHI ~ l ng an) conneclions i h other dev ices always turn

off the power 10 all equ ipment first this will help prevent

dam ~gt ur malfuncti on

bull 1)0 not U e Ihi s un it on the same poveer circuit with a dev ice

which draws a 101 of power

bull VO lei (1Jl11aging the power co rd do not Slep on it place heavy

obj ctS on it et C

[PlacementJ

bull Do not subject Ihe unit to temperature ex tremes (eg direc t

sunlight in an cnclosed vehi cl e) Avoid using or storing the

un it in dusty or humid areas or areas that are subject to high

ibration level s

bull T hiS unit may interfere with radio and tel e ision reception Do

nOI use thi s unit in the vicinit y of such receivers

[Main tenance]

bull Fur everyday cleaning wipe the unit with

one that has bee n li ghtl y dampened with

stubborn din use a mild neutral dctergent

a so ft dry clo th (o r

wa ter) To remo ve

Aft erwards be sure

to wipe the unit thoroughly with a soft dry cloth

bull Never USc hen ze ne thinners alcohol or so lvents of an y kind to

avoid the ri sk of discoloration andor deformation

[Addi tio nal Precautio ns]

bull Protcc t the unit from strong impact

bull Do not allow objects or liquids of any kind to penetrate the

unit In the cvent of such an occurre nce discontinue use

im media tely Contact qualified service pCI)onnel as soon as

poss ibl e

bull eve r strike o r app ly strong pressure to the di splay

bull A small amount of heat wil l radiate from the unit and thus

shou ld be considered normal

bull Before usi ng th e uni t in a foreign country cunsult with

qualified serv ice personnel

bull Should a malfunction occur (or if yo u suspect thcre is a

problem ) discontinue use immediat ely Con tact qua lified

serv ice personnel as soon as poss ible

There an

hum noi

ari ab le I

a rlier nmiddot

high pte

-ef How noi

the IUt

the dirre

nO t ~e F

noise bu

even w ht

igna l di i

The S-Jshy

situa ti n

I he SN

fi ve ban

Signal d

cir uitl)

Ie d del

t hl e ~ hrl l d

prono unc

achie ve c

it tuay

sound qu

The S -

bands as

Noi se ( 5 ba

OJ gt -

4

50

bull STRUCTURE OF THE SN-550

STRUCTURE OF THE SN-550

cloth (or

o remoe

s be sure

y kind to

etrate the

ti nue use

S soon as

and thus

sui t w ith

hue is a

qualified

There are various ty pes of noise noise genera ted by a unit it d f

hum noise caused by the powe r supply line noise caused by a

va ri able lighting sy tem a CRT displ ay or com puter

Earlier noise reducti on or noi se gate units ha ve been ef fecti ve for

high pi tch noise but not so for middle or low pitch noise

bull Noise Canceling

How noise is actually percei ved by a listener vari es dependi ng on

the volume difference between the aud io signal and noise andor

the difference in th e frequ ency conlenl of the audio signal and

noise For example wh en a sound is loud you may not nOlice the

no ise bUI w hen the sound is low Ihc noise rna ) aud ih le A lso

eve n w hen the noi se is low if Ihe frequ ency co nlenl of Ihe audi o

signal diffe rs from th at o f the noisc the noise may be prominent

The S -550 s no ise cancelin g unit funclions in response 10 the

itualions described above

T he lt [ -550 s no ise can ce ling unil d iv ides Ihe audio signl l into

fi ve bands Each band has a noi c supp re scr W hen the Input

sign al drops below th e threshold level Ihe noise canceling

cir cuilr w i ll sta n wo rk ing Th at is it controls the noise reduction

leel uependin g on the level of the input signal W hen Ihe

threshol d level is raised the noise reduct ion effect w ill be more

pronounced but the s0und quality w ill be adve rsely affec ted To

achi ev a sa tis factory result you Ill USt smiddot t th e threshold levcl w hile

ac tuall y l isten ing to the noise reduction effect and the su bsequent

so und qual ity allera t io n

The SI -~ 50 s no ise cance ler redu c e~ no ise in individual frequency

ba nds iL dc rrbed abOVe

Norse Canceling Characteris tic ( 5 ba nds 350 700 1A k 28 k 56 kHz )

Q)

gt Q)

--

50 100 Frequency

Su ch de vi ces are almost useless for hum caused by powe r

supplies

The SN-550 howeve r reso lves such problem s w ith the latest

signal processing technology while m inim iz ing tonal alterat ion

duri ng the noi se elimination proCeSS

Hum Canceling

The SN -550s hum cancel i ng unit is an updated version of a unit

used in previous Ro land products T hi s updal ed unit is even more

effec ti ve for rcmovi ng hum and has less impaci on th e resultin g

w ith sou nd quality

Hum is a low frequ ency noise consi st ing of several hannonically

rel ated frequ cncies and results from the interacti on of some

electronic dev ice and th e powe r supply Hum consists of the

hannoni cs related to the frequ ency of the power supr l ( usua lly

50 or 60 Hz ) Ordi nary hum canceler l-em Ol- C these hanlloni cgt

by use of a co mb filt er Hum noise can be reduced by usin g a

comb fil le r but i t may alter or eliminate ponl ons o f the audi o

signal in th e same frequ ency range

To minimi ze such probl ems the SN-550 uses a suppre or th at

wo rks only on the freq u~ncy that has the same harmonics as the

hum T he lower th e input signal is below the th reshold evel the

greater the hum canceling effect

Frequency spectrum o f the hum (basic frequency 60 Hz) which is created by the power supply of a variable lightrng system and picked up by a guita r s pick up

Q)

gt Q)

--

o Frequency 1 k (Hz)

+ Hum Canceling Characteris tic ( in 6 0 Hz ste ps

I 1 k ( Hz)

I I I I I Io Frequency

t The hurr) rs removed

5

a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

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shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

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ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

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BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

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II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

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Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

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Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

--

Q

A ATTENTION HISOlJE DE CHOC ElEtlM EPAS OUllAoFI

CAUTION TO REDUCE THE RISK OF ELECTRI C SHOCK

DO NOT REMOVE COV R (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO OUALIFIED SERVICE PERSONNEL

A T e lightning flash with arrowhead symbol lIhln an equllal shy

ral Inangle IS inlended 10 alen the user to the presence 01

unlnsulated dangerous voltagemiddot wIthin the producl S enrlomiddot sure Ihal may be 0 1 suti lclenl magnilude 10 con IItule a rosk 01 Icc ric shock 10 persons

Ttl exclamallo poonl wi n an equtla leral lrianglo is Intended 10 lert Ih Usr 10 the presence 0 1 importan l operating and Olamlenance (sorvlclng Instructions in the rtleratureaccompashyIng Ihe product

Than inclu( live f

read

INSTRUCTIONS PERTAINING TO A RISK OF FIRE ELECTRIC SHOCK OR INJURY TO PERSONS FEA

IMPORTANT SAFETY INSTRUCTIONS ca n reSAVE THESE INSTRUCTIONS vanabl WARNING - When using electnc products bas ic procaut ions should alw ys be followed including the following

rlcktd

1 Read all the instruct ions before using the product 8 The power-supply cord of Ihe producl shOuld be unplugged from Ihe oullel when lell unused for a long period of lime 2 Do not use th is product near water - for example near a li ve rt

bathtub washbowt kllcllen sink in a wet basemen t or near a 9 Care should be taken so Ihal objecls do nollall and liquids are

sWimming pool or the like not spi lled inlo the enclosure th rough openings

10 The produc l should be serviced by qualified service personnel n the3 This producl should be used only w llh a cart or sland Ihat IS when recommended by Ihe manufacturer bands A The powe r-supply cord or Ihe plug has been damaged or 4 ThiS produCI either atone or in combinalton with an amplil ler frequt l B ObJecl s tave lallen or liquid has been spilled on lo Ihe

sound levels Ihal could cause permanenl hearing loss Do nol and headphones or speakers may be capable of producmg

producl or Ihe noi

operale for a long period of lime al a high volume level or al a C The producl has been exposed to rain or

levelltlal is uncomfortable If you experience any hearing loss D The produCI does nol appear 10 opera Ie normally or The hexhibilS a marked change in performance or or ringing in the ears you should consult an audiologl t

E The product has been dropped or Ihe enclosure damshy allerali5 The producl should be localed so Ihat ils localion or pOSllion aged does nol in lerfere wilh its proper venlilalion surply

11 Do nol allempllo service Ihe product beyond thai described In 6 The produci shou ld be localed away from heal sources sucll as delec liIhe user-mainlenance inslructions All other servicing should ra dialors heal regislers or olher producls thai produce h al be referred to qualified service personnel

7 The producl should be connecled 10 a power supply only of Ihe Iype described in the operaling inslrucltonsor as marked on the Ow ing produc adjustr

For Ihe USA

ThiS product may be eqUipped Wllh a pol ri led lin plug (one blade wider Ihan Ihe olher ) ThiS is a sa lety feature If you are unable 10 Insert the plug into the outlel con lacl an elecl riclan 10 re~ lace your obsolele outlet Do nol defeal lhe safely purpose of Ihe plug

For Canada co~ For Polari zed Une Pl ug

CAUTION TO PR VENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY INSERT Impor

ATENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODU IRE LA LAME LA PLUS LAR GE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU FON D

bull SIrUCI

bull Pan elFor Ihe UK

WARNING THE APPARATUS MUST BE EflRTHED

IMPORTANT THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLIOWING CODE GREEN-AND-Y LLOW EARTH BLU E NEUTRAL BROWN LIV E

As Ihe co lours ollhe wires in Ihe mains lead of Ihis apparalus may nol correspond wi lh Ihe coloured markings Identllytng Ihe lerminals in your plug proceed as lo llows

The wire which is coloured GREEN-ANO-YELLOW musl be connecled 10 Ihe lerminal in Ihe plug which is marked by Ihe leiter

E Or by Ihe safely earth symbol orcoloured GREEN or GREENmiddotAND YELLOW The wire which is coloured BLUE must be connecled 10 Ihe lerminal which is marked wilh Ihe leller N or coloured BLACK The wire which IS coloured BROWN must be connecled 10 Ihe lerminal which is marked wi lh Ihe leller L or coloured RED

The producl wh ich is equipped wllh a THR EE WIRE GROUNDING TYPE LINE PLUG muSI be rounded

ulla shyCO 0 1

ncloshy15k 0 1

Thank you for purchasing the Roland SN-550 Digital Noise Eliminator The SN-550

nded includes both noise and hum canceling units that can effectively reduce noise during I and mpashy

live performances and studio recordings read this owners manual carefully

To make the best use of this device please

FEATURES

1ged e

-i are

The S SSO includes both noi ( an d hum canccling units which

can Ieduce Ihe noise generated by mu sical insllumen ls o r

va riabl e lighling sys lems Ih e hum caused by power suppli c or

pi c ~cd up by mi croph ones an d guitars Ihe lape h i s~ of anal ug

reco rding equi pmenl elc II can therefore be eflccli e ly lI sed in

liv e pe rfo lmance or sludio reco rdlll g s ilu ali ons

d or ) Ihe

In Ih e noise ca nceling uni Ih e input s ign al is di vided into fi ve

bands Thi s makes it possible to reduce Ihe noise in a sp ec ific

fre quenc y range o f each band th ere fore effec ti ve ly removing

th e noi se from the input signal

Iy or

jam-

ad In lould

The hUIll canceling ullit remo ves hum with minimal tonal

alt e ration It effec tiv ely removes the hum caused by po we r

suppl y line s With an auto mati c pow er suppl y frequ ency

detectin g system

bull Uwing to th e lat es t s ign al process ing

ad justm ent s con be made quickl y and easily

lechoology fin e

The 1 -550 features a moni to ring funcl lon that all ows yo u to

monitor Ih e noise and hum ca nceli ng opern tions

An intemal leve l-contro llin g sys tem is used to adjusl Ih e signal

without affec tin g the input o r out pUt le ve l

The Sl middot550 has two comp letely ind epe ndent channels fo r signal

processi ng and there fo re can be connected to a ste reo s() und

source or two mono sound so urces with dilT rent settings fo r

eac h source

Both 14 inch phone and XLR balanced connectors are provided

for in put and output so that the S 550 call be useJ wi th variougt

types of devices

Anal g circui ts arc con truc lcd Wit h di screte systems al al l

stages to ensure high quality sound

The SN-550 features a bYPJs (ono ff) swilch When thi s

sw itch is turned on the inpu t Signal will be ou tput without

passing th rough th e internal circuits

CONTENTS

4bull Imponant Jotes bull Conn ec ti ons middotmiddot middotmiddot9

bull S truclure of th S-J -550middot middot middot bull Setllngs middot middot 11

bull Panel Desc ription 6 bull Spec ifications 12

Copyright copy 990 by ROLAND CORPORATION

All rights rese rved No part of this publicat ion ma y be reproduced in

any fo rm without the written permission of ROLAND CORPORATION

3

IMPORTANT NOTES

MPORTANT NOTES In IJ dilion 10 Ihe Hems lisled under Safety Pre ca utions on page 2

plcase read and ad here to the follow ing

[Power Supply]

bull Wilen nHI ~ l ng an) conneclions i h other dev ices always turn

off the power 10 all equ ipment first this will help prevent

dam ~gt ur malfuncti on

bull 1)0 not U e Ihi s un it on the same poveer circuit with a dev ice

which draws a 101 of power

bull VO lei (1Jl11aging the power co rd do not Slep on it place heavy

obj ctS on it et C

[PlacementJ

bull Do not subject Ihe unit to temperature ex tremes (eg direc t

sunlight in an cnclosed vehi cl e) Avoid using or storing the

un it in dusty or humid areas or areas that are subject to high

ibration level s

bull T hiS unit may interfere with radio and tel e ision reception Do

nOI use thi s unit in the vicinit y of such receivers

[Main tenance]

bull Fur everyday cleaning wipe the unit with

one that has bee n li ghtl y dampened with

stubborn din use a mild neutral dctergent

a so ft dry clo th (o r

wa ter) To remo ve

Aft erwards be sure

to wipe the unit thoroughly with a soft dry cloth

bull Never USc hen ze ne thinners alcohol or so lvents of an y kind to

avoid the ri sk of discoloration andor deformation

[Addi tio nal Precautio ns]

bull Protcc t the unit from strong impact

bull Do not allow objects or liquids of any kind to penetrate the

unit In the cvent of such an occurre nce discontinue use

im media tely Contact qualified service pCI)onnel as soon as

poss ibl e

bull eve r strike o r app ly strong pressure to the di splay

bull A small amount of heat wil l radiate from the unit and thus

shou ld be considered normal

bull Before usi ng th e uni t in a foreign country cunsult with

qualified serv ice personnel

bull Should a malfunction occur (or if yo u suspect thcre is a

problem ) discontinue use immediat ely Con tact qua lified

serv ice personnel as soon as poss ible

There an

hum noi

ari ab le I

a rlier nmiddot

high pte

-ef How noi

the IUt

the dirre

nO t ~e F

noise bu

even w ht

igna l di i

The S-Jshy

situa ti n

I he SN

fi ve ban

Signal d

cir uitl)

Ie d del

t hl e ~ hrl l d

prono unc

achie ve c

it tuay

sound qu

The S -

bands as

Noi se ( 5 ba

OJ gt -

4

50

bull STRUCTURE OF THE SN-550

STRUCTURE OF THE SN-550

cloth (or

o remoe

s be sure

y kind to

etrate the

ti nue use

S soon as

and thus

sui t w ith

hue is a

qualified

There are various ty pes of noise noise genera ted by a unit it d f

hum noise caused by the powe r supply line noise caused by a

va ri able lighting sy tem a CRT displ ay or com puter

Earlier noise reducti on or noi se gate units ha ve been ef fecti ve for

high pi tch noise but not so for middle or low pitch noise

bull Noise Canceling

How noise is actually percei ved by a listener vari es dependi ng on

the volume difference between the aud io signal and noise andor

the difference in th e frequ ency conlenl of the audio signal and

noise For example wh en a sound is loud you may not nOlice the

no ise bUI w hen the sound is low Ihc noise rna ) aud ih le A lso

eve n w hen the noi se is low if Ihe frequ ency co nlenl of Ihe audi o

signal diffe rs from th at o f the noisc the noise may be prominent

The S -550 s no ise cancelin g unit funclions in response 10 the

itualions described above

T he lt [ -550 s no ise can ce ling unil d iv ides Ihe audio signl l into

fi ve bands Each band has a noi c supp re scr W hen the Input

sign al drops below th e threshold level Ihe noise canceling

cir cuilr w i ll sta n wo rk ing Th at is it controls the noise reduction

leel uependin g on the level of the input signal W hen Ihe

threshol d level is raised the noise reduct ion effect w ill be more

pronounced but the s0und quality w ill be adve rsely affec ted To

achi ev a sa tis factory result you Ill USt smiddot t th e threshold levcl w hile

ac tuall y l isten ing to the noise reduction effect and the su bsequent

so und qual ity allera t io n

The SI -~ 50 s no ise cance ler redu c e~ no ise in individual frequency

ba nds iL dc rrbed abOVe

Norse Canceling Characteris tic ( 5 ba nds 350 700 1A k 28 k 56 kHz )

Q)

gt Q)

--

50 100 Frequency

Su ch de vi ces are almost useless for hum caused by powe r

supplies

The SN-550 howeve r reso lves such problem s w ith the latest

signal processing technology while m inim iz ing tonal alterat ion

duri ng the noi se elimination proCeSS

Hum Canceling

The SN -550s hum cancel i ng unit is an updated version of a unit

used in previous Ro land products T hi s updal ed unit is even more

effec ti ve for rcmovi ng hum and has less impaci on th e resultin g

w ith sou nd quality

Hum is a low frequ ency noise consi st ing of several hannonically

rel ated frequ cncies and results from the interacti on of some

electronic dev ice and th e powe r supply Hum consists of the

hannoni cs related to the frequ ency of the power supr l ( usua lly

50 or 60 Hz ) Ordi nary hum canceler l-em Ol- C these hanlloni cgt

by use of a co mb filt er Hum noise can be reduced by usin g a

comb fil le r but i t may alter or eliminate ponl ons o f the audi o

signal in th e same frequ ency range

To minimi ze such probl ems the SN-550 uses a suppre or th at

wo rks only on the freq u~ncy that has the same harmonics as the

hum T he lower th e input signal is below the th reshold evel the

greater the hum canceling effect

Frequency spectrum o f the hum (basic frequency 60 Hz) which is created by the power supply of a variable lightrng system and picked up by a guita r s pick up

Q)

gt Q)

--

o Frequency 1 k (Hz)

+ Hum Canceling Characteris tic ( in 6 0 Hz ste ps

I 1 k ( Hz)

I I I I I Io Frequency

t The hurr) rs removed

5

a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

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TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

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Thank you for purchasing the Roland SN-550 Digital Noise Eliminator The SN-550

nded includes both noise and hum canceling units that can effectively reduce noise during I and mpashy

live performances and studio recordings read this owners manual carefully

To make the best use of this device please

FEATURES

1ged e

-i are

The S SSO includes both noi ( an d hum canccling units which

can Ieduce Ihe noise generated by mu sical insllumen ls o r

va riabl e lighling sys lems Ih e hum caused by power suppli c or

pi c ~cd up by mi croph ones an d guitars Ihe lape h i s~ of anal ug

reco rding equi pmenl elc II can therefore be eflccli e ly lI sed in

liv e pe rfo lmance or sludio reco rdlll g s ilu ali ons

d or ) Ihe

In Ih e noise ca nceling uni Ih e input s ign al is di vided into fi ve

bands Thi s makes it possible to reduce Ihe noise in a sp ec ific

fre quenc y range o f each band th ere fore effec ti ve ly removing

th e noi se from the input signal

Iy or

jam-

ad In lould

The hUIll canceling ullit remo ves hum with minimal tonal

alt e ration It effec tiv ely removes the hum caused by po we r

suppl y line s With an auto mati c pow er suppl y frequ ency

detectin g system

bull Uwing to th e lat es t s ign al process ing

ad justm ent s con be made quickl y and easily

lechoology fin e

The 1 -550 features a moni to ring funcl lon that all ows yo u to

monitor Ih e noise and hum ca nceli ng opern tions

An intemal leve l-contro llin g sys tem is used to adjusl Ih e signal

without affec tin g the input o r out pUt le ve l

The Sl middot550 has two comp letely ind epe ndent channels fo r signal

processi ng and there fo re can be connected to a ste reo s() und

source or two mono sound so urces with dilT rent settings fo r

eac h source

Both 14 inch phone and XLR balanced connectors are provided

for in put and output so that the S 550 call be useJ wi th variougt

types of devices

Anal g circui ts arc con truc lcd Wit h di screte systems al al l

stages to ensure high quality sound

The SN-550 features a bYPJs (ono ff) swilch When thi s

sw itch is turned on the inpu t Signal will be ou tput without

passing th rough th e internal circuits

CONTENTS

4bull Imponant Jotes bull Conn ec ti ons middotmiddot middotmiddot9

bull S truclure of th S-J -550middot middot middot bull Setllngs middot middot 11

bull Panel Desc ription 6 bull Spec ifications 12

Copyright copy 990 by ROLAND CORPORATION

All rights rese rved No part of this publicat ion ma y be reproduced in

any fo rm without the written permission of ROLAND CORPORATION

3

IMPORTANT NOTES

MPORTANT NOTES In IJ dilion 10 Ihe Hems lisled under Safety Pre ca utions on page 2

plcase read and ad here to the follow ing

[Power Supply]

bull Wilen nHI ~ l ng an) conneclions i h other dev ices always turn

off the power 10 all equ ipment first this will help prevent

dam ~gt ur malfuncti on

bull 1)0 not U e Ihi s un it on the same poveer circuit with a dev ice

which draws a 101 of power

bull VO lei (1Jl11aging the power co rd do not Slep on it place heavy

obj ctS on it et C

[PlacementJ

bull Do not subject Ihe unit to temperature ex tremes (eg direc t

sunlight in an cnclosed vehi cl e) Avoid using or storing the

un it in dusty or humid areas or areas that are subject to high

ibration level s

bull T hiS unit may interfere with radio and tel e ision reception Do

nOI use thi s unit in the vicinit y of such receivers

[Main tenance]

bull Fur everyday cleaning wipe the unit with

one that has bee n li ghtl y dampened with

stubborn din use a mild neutral dctergent

a so ft dry clo th (o r

wa ter) To remo ve

Aft erwards be sure

to wipe the unit thoroughly with a soft dry cloth

bull Never USc hen ze ne thinners alcohol or so lvents of an y kind to

avoid the ri sk of discoloration andor deformation

[Addi tio nal Precautio ns]

bull Protcc t the unit from strong impact

bull Do not allow objects or liquids of any kind to penetrate the

unit In the cvent of such an occurre nce discontinue use

im media tely Contact qualified service pCI)onnel as soon as

poss ibl e

bull eve r strike o r app ly strong pressure to the di splay

bull A small amount of heat wil l radiate from the unit and thus

shou ld be considered normal

bull Before usi ng th e uni t in a foreign country cunsult with

qualified serv ice personnel

bull Should a malfunction occur (or if yo u suspect thcre is a

problem ) discontinue use immediat ely Con tact qua lified

serv ice personnel as soon as poss ible

There an

hum noi

ari ab le I

a rlier nmiddot

high pte

-ef How noi

the IUt

the dirre

nO t ~e F

noise bu

even w ht

igna l di i

The S-Jshy

situa ti n

I he SN

fi ve ban

Signal d

cir uitl)

Ie d del

t hl e ~ hrl l d

prono unc

achie ve c

it tuay

sound qu

The S -

bands as

Noi se ( 5 ba

OJ gt -

4

50

bull STRUCTURE OF THE SN-550

STRUCTURE OF THE SN-550

cloth (or

o remoe

s be sure

y kind to

etrate the

ti nue use

S soon as

and thus

sui t w ith

hue is a

qualified

There are various ty pes of noise noise genera ted by a unit it d f

hum noise caused by the powe r supply line noise caused by a

va ri able lighting sy tem a CRT displ ay or com puter

Earlier noise reducti on or noi se gate units ha ve been ef fecti ve for

high pi tch noise but not so for middle or low pitch noise

bull Noise Canceling

How noise is actually percei ved by a listener vari es dependi ng on

the volume difference between the aud io signal and noise andor

the difference in th e frequ ency conlenl of the audio signal and

noise For example wh en a sound is loud you may not nOlice the

no ise bUI w hen the sound is low Ihc noise rna ) aud ih le A lso

eve n w hen the noi se is low if Ihe frequ ency co nlenl of Ihe audi o

signal diffe rs from th at o f the noisc the noise may be prominent

The S -550 s no ise cancelin g unit funclions in response 10 the

itualions described above

T he lt [ -550 s no ise can ce ling unil d iv ides Ihe audio signl l into

fi ve bands Each band has a noi c supp re scr W hen the Input

sign al drops below th e threshold level Ihe noise canceling

cir cuilr w i ll sta n wo rk ing Th at is it controls the noise reduction

leel uependin g on the level of the input signal W hen Ihe

threshol d level is raised the noise reduct ion effect w ill be more

pronounced but the s0und quality w ill be adve rsely affec ted To

achi ev a sa tis factory result you Ill USt smiddot t th e threshold levcl w hile

ac tuall y l isten ing to the noise reduction effect and the su bsequent

so und qual ity allera t io n

The SI -~ 50 s no ise cance ler redu c e~ no ise in individual frequency

ba nds iL dc rrbed abOVe

Norse Canceling Characteris tic ( 5 ba nds 350 700 1A k 28 k 56 kHz )

Q)

gt Q)

--

50 100 Frequency

Su ch de vi ces are almost useless for hum caused by powe r

supplies

The SN-550 howeve r reso lves such problem s w ith the latest

signal processing technology while m inim iz ing tonal alterat ion

duri ng the noi se elimination proCeSS

Hum Canceling

The SN -550s hum cancel i ng unit is an updated version of a unit

used in previous Ro land products T hi s updal ed unit is even more

effec ti ve for rcmovi ng hum and has less impaci on th e resultin g

w ith sou nd quality

Hum is a low frequ ency noise consi st ing of several hannonically

rel ated frequ cncies and results from the interacti on of some

electronic dev ice and th e powe r supply Hum consists of the

hannoni cs related to the frequ ency of the power supr l ( usua lly

50 or 60 Hz ) Ordi nary hum canceler l-em Ol- C these hanlloni cgt

by use of a co mb filt er Hum noise can be reduced by usin g a

comb fil le r but i t may alter or eliminate ponl ons o f the audi o

signal in th e same frequ ency range

To minimi ze such probl ems the SN-550 uses a suppre or th at

wo rks only on the freq u~ncy that has the same harmonics as the

hum T he lower th e input signal is below the th reshold evel the

greater the hum canceling effect

Frequency spectrum o f the hum (basic frequency 60 Hz) which is created by the power supply of a variable lightrng system and picked up by a guita r s pick up

Q)

gt Q)

--

o Frequency 1 k (Hz)

+ Hum Canceling Characteris tic ( in 6 0 Hz ste ps

I 1 k ( Hz)

I I I I I Io Frequency

t The hurr) rs removed

5

a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

IMPORTANT NOTES

MPORTANT NOTES In IJ dilion 10 Ihe Hems lisled under Safety Pre ca utions on page 2

plcase read and ad here to the follow ing

[Power Supply]

bull Wilen nHI ~ l ng an) conneclions i h other dev ices always turn

off the power 10 all equ ipment first this will help prevent

dam ~gt ur malfuncti on

bull 1)0 not U e Ihi s un it on the same poveer circuit with a dev ice

which draws a 101 of power

bull VO lei (1Jl11aging the power co rd do not Slep on it place heavy

obj ctS on it et C

[PlacementJ

bull Do not subject Ihe unit to temperature ex tremes (eg direc t

sunlight in an cnclosed vehi cl e) Avoid using or storing the

un it in dusty or humid areas or areas that are subject to high

ibration level s

bull T hiS unit may interfere with radio and tel e ision reception Do

nOI use thi s unit in the vicinit y of such receivers

[Main tenance]

bull Fur everyday cleaning wipe the unit with

one that has bee n li ghtl y dampened with

stubborn din use a mild neutral dctergent

a so ft dry clo th (o r

wa ter) To remo ve

Aft erwards be sure

to wipe the unit thoroughly with a soft dry cloth

bull Never USc hen ze ne thinners alcohol or so lvents of an y kind to

avoid the ri sk of discoloration andor deformation

[Addi tio nal Precautio ns]

bull Protcc t the unit from strong impact

bull Do not allow objects or liquids of any kind to penetrate the

unit In the cvent of such an occurre nce discontinue use

im media tely Contact qualified service pCI)onnel as soon as

poss ibl e

bull eve r strike o r app ly strong pressure to the di splay

bull A small amount of heat wil l radiate from the unit and thus

shou ld be considered normal

bull Before usi ng th e uni t in a foreign country cunsult with

qualified serv ice personnel

bull Should a malfunction occur (or if yo u suspect thcre is a

problem ) discontinue use immediat ely Con tact qua lified

serv ice personnel as soon as poss ible

There an

hum noi

ari ab le I

a rlier nmiddot

high pte

-ef How noi

the IUt

the dirre

nO t ~e F

noise bu

even w ht

igna l di i

The S-Jshy

situa ti n

I he SN

fi ve ban

Signal d

cir uitl)

Ie d del

t hl e ~ hrl l d

prono unc

achie ve c

it tuay

sound qu

The S -

bands as

Noi se ( 5 ba

OJ gt -

4

50

bull STRUCTURE OF THE SN-550

STRUCTURE OF THE SN-550

cloth (or

o remoe

s be sure

y kind to

etrate the

ti nue use

S soon as

and thus

sui t w ith

hue is a

qualified

There are various ty pes of noise noise genera ted by a unit it d f

hum noise caused by the powe r supply line noise caused by a

va ri able lighting sy tem a CRT displ ay or com puter

Earlier noise reducti on or noi se gate units ha ve been ef fecti ve for

high pi tch noise but not so for middle or low pitch noise

bull Noise Canceling

How noise is actually percei ved by a listener vari es dependi ng on

the volume difference between the aud io signal and noise andor

the difference in th e frequ ency conlenl of the audio signal and

noise For example wh en a sound is loud you may not nOlice the

no ise bUI w hen the sound is low Ihc noise rna ) aud ih le A lso

eve n w hen the noi se is low if Ihe frequ ency co nlenl of Ihe audi o

signal diffe rs from th at o f the noisc the noise may be prominent

The S -550 s no ise cancelin g unit funclions in response 10 the

itualions described above

T he lt [ -550 s no ise can ce ling unil d iv ides Ihe audio signl l into

fi ve bands Each band has a noi c supp re scr W hen the Input

sign al drops below th e threshold level Ihe noise canceling

cir cuilr w i ll sta n wo rk ing Th at is it controls the noise reduction

leel uependin g on the level of the input signal W hen Ihe

threshol d level is raised the noise reduct ion effect w ill be more

pronounced but the s0und quality w ill be adve rsely affec ted To

achi ev a sa tis factory result you Ill USt smiddot t th e threshold levcl w hile

ac tuall y l isten ing to the noise reduction effect and the su bsequent

so und qual ity allera t io n

The SI -~ 50 s no ise cance ler redu c e~ no ise in individual frequency

ba nds iL dc rrbed abOVe

Norse Canceling Characteris tic ( 5 ba nds 350 700 1A k 28 k 56 kHz )

Q)

gt Q)

--

50 100 Frequency

Su ch de vi ces are almost useless for hum caused by powe r

supplies

The SN-550 howeve r reso lves such problem s w ith the latest

signal processing technology while m inim iz ing tonal alterat ion

duri ng the noi se elimination proCeSS

Hum Canceling

The SN -550s hum cancel i ng unit is an updated version of a unit

used in previous Ro land products T hi s updal ed unit is even more

effec ti ve for rcmovi ng hum and has less impaci on th e resultin g

w ith sou nd quality

Hum is a low frequ ency noise consi st ing of several hannonically

rel ated frequ cncies and results from the interacti on of some

electronic dev ice and th e powe r supply Hum consists of the

hannoni cs related to the frequ ency of the power supr l ( usua lly

50 or 60 Hz ) Ordi nary hum canceler l-em Ol- C these hanlloni cgt

by use of a co mb filt er Hum noise can be reduced by usin g a

comb fil le r but i t may alter or eliminate ponl ons o f the audi o

signal in th e same frequ ency range

To minimi ze such probl ems the SN-550 uses a suppre or th at

wo rks only on the freq u~ncy that has the same harmonics as the

hum T he lower th e input signal is below the th reshold evel the

greater the hum canceling effect

Frequency spectrum o f the hum (basic frequency 60 Hz) which is created by the power supply of a variable lightrng system and picked up by a guita r s pick up

Q)

gt Q)

--

o Frequency 1 k (Hz)

+ Hum Canceling Characteris tic ( in 6 0 Hz ste ps

I 1 k ( Hz)

I I I I I Io Frequency

t The hurr) rs removed

5

a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

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HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

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ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

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Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

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HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

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La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

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VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

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ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

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j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

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THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

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INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

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Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

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bull STRUCTURE OF THE SN-550

STRUCTURE OF THE SN-550

cloth (or

o remoe

s be sure

y kind to

etrate the

ti nue use

S soon as

and thus

sui t w ith

hue is a

qualified

There are various ty pes of noise noise genera ted by a unit it d f

hum noise caused by the powe r supply line noise caused by a

va ri able lighting sy tem a CRT displ ay or com puter

Earlier noise reducti on or noi se gate units ha ve been ef fecti ve for

high pi tch noise but not so for middle or low pitch noise

bull Noise Canceling

How noise is actually percei ved by a listener vari es dependi ng on

the volume difference between the aud io signal and noise andor

the difference in th e frequ ency conlenl of the audio signal and

noise For example wh en a sound is loud you may not nOlice the

no ise bUI w hen the sound is low Ihc noise rna ) aud ih le A lso

eve n w hen the noi se is low if Ihe frequ ency co nlenl of Ihe audi o

signal diffe rs from th at o f the noisc the noise may be prominent

The S -550 s no ise cancelin g unit funclions in response 10 the

itualions described above

T he lt [ -550 s no ise can ce ling unil d iv ides Ihe audio signl l into

fi ve bands Each band has a noi c supp re scr W hen the Input

sign al drops below th e threshold level Ihe noise canceling

cir cuilr w i ll sta n wo rk ing Th at is it controls the noise reduction

leel uependin g on the level of the input signal W hen Ihe

threshol d level is raised the noise reduct ion effect w ill be more

pronounced but the s0und quality w ill be adve rsely affec ted To

achi ev a sa tis factory result you Ill USt smiddot t th e threshold levcl w hile

ac tuall y l isten ing to the noise reduction effect and the su bsequent

so und qual ity allera t io n

The SI -~ 50 s no ise cance ler redu c e~ no ise in individual frequency

ba nds iL dc rrbed abOVe

Norse Canceling Characteris tic ( 5 ba nds 350 700 1A k 28 k 56 kHz )

Q)

gt Q)

--

50 100 Frequency

Su ch de vi ces are almost useless for hum caused by powe r

supplies

The SN-550 howeve r reso lves such problem s w ith the latest

signal processing technology while m inim iz ing tonal alterat ion

duri ng the noi se elimination proCeSS

Hum Canceling

The SN -550s hum cancel i ng unit is an updated version of a unit

used in previous Ro land products T hi s updal ed unit is even more

effec ti ve for rcmovi ng hum and has less impaci on th e resultin g

w ith sou nd quality

Hum is a low frequ ency noise consi st ing of several hannonically

rel ated frequ cncies and results from the interacti on of some

electronic dev ice and th e powe r supply Hum consists of the

hannoni cs related to the frequ ency of the power supr l ( usua lly

50 or 60 Hz ) Ordi nary hum canceler l-em Ol- C these hanlloni cgt

by use of a co mb filt er Hum noise can be reduced by usin g a

comb fil le r but i t may alter or eliminate ponl ons o f the audi o

signal in th e same frequ ency range

To minimi ze such probl ems the SN-550 uses a suppre or th at

wo rks only on the freq u~ncy that has the same harmonics as the

hum T he lower th e input signal is below the th reshold evel the

greater the hum canceling effect

Frequency spectrum o f the hum (basic frequency 60 Hz) which is created by the power supply of a variable lightrng system and picked up by a guita r s pick up

Q)

gt Q)

--

o Frequency 1 k (Hz)

+ Hum Canceling Characteris tic ( in 6 0 Hz ste ps

I 1 k ( Hz)

I I I I I Io Frequency

t The hurr) rs removed

5

a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

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FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

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Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

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MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

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La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

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I r middot )1 ~[O r)( 1 1 11

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ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

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INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

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TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

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Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

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a

bull PANEL DESCRIPTION

bull PANEL DESCRIPTION lt Front Panelgt

CD Bypass Indicator Internal Lcvel Meters (A B) (j) Noise C

Internal Level Hum Canceling bull ________________~---dD~2--B-y-p-as-s-s~w-l-tc-h--------------~---~-5--N-O_is_e_c_a_n_CC_Iin_g_M ~J__o_n_ito_r_S_(_A+_B__) ___ + ____

Control Knobs ( A B ) Monitors ( A B ) r o Rolan LJIGITAL NmfE -ELliIINATD~-- - - --- --r ----- ---- if-- - -~

I JlE~hL) E El _ lIdERN AI LEVEL MpoundHR _ ) C~NC l ~ oN d OR _ tH ~ ls( ltA BYPASS 1 I[ ~OtSE I I HU M I 1 c]1

~ _ =1bullbullbullbull bullif--- - tH 11 1111111111111111111111111111

_ ~ OBJ 4~ ~ ~J~ ~ 1)~ ~9 ~ ~ ~ ~ OO I 41o2IJ5 ~~ middotmiddot ~I~d CHl1 copy~ c s 1111111111111111111111111 11111 ~ii ~- bull _-1--J ~ o D tIN oUt I 1 __ __ _ _ _ ___ __ _ - _ ____ _ ___ J L _ __ _ ------ J L __ ___ J L _____ _ _ J ~II

CD Bypass Indicator This is Iii when Ih t B pass Swilch is IUmcd on

~ Bypass Switch When this switch is tumed on the inpul signal wi ll be output

without pa -sing through the intemal circuits The Bypass Switch

can be switched on or off even while the unit is tumed off ( In

this CgtlSt the Byr ss Indicator will not light )

When the Bypass Switch is switched on the noise and

hum canceling functicns will be turned on but this will not

aHect the output signal

When the input and output signal is unbalanced the output

level will depend on whether the Bypass Switch is on or

oH This however is normal on this unit

Internal Level Control Knobs ( A B ) Use Ihis knoh 10 change the signa l level of the )nt emal circuits

depending on Ihe OUlput leve l of th e connecled unit ( This knob

covers thc output leve l of Ihe conneeled unit from 20 10 +4

dRm)

- 20dBm

Changing the Internal Level Control Knobs does not affect

the output level of the SN-550

lnternal Level Meters (A B ) These mel ers indicales th e signal leve l of Ihe intemal circuils

Since these are peak reading meters you can delermine the

maximum level An appropriate signal level is between - 18 and

OdB

When the CLIP indicator is lit the signal will not be

properly processed

Noise Canceling Monitors ( A B ) These displays indicale when the no ise canceling funclion is

wo rking in each frequency band When the indIcator is Iii Ihe

noise cancelin g circuilry is worki ng in Ihal frequency band

anceling Monitors (A B) These displays indi cate the basic frequency where the hum

canceler works and whet her the hum canceler is working or nol

When Ihe hum canceler is working Ihe indiclttlor above (chan nel

A) andor below (channel B) the basic frequ ency display wilili ghi

The~c DL

hen ull

rh i~ k ilO

working

These be

l J ll l CI i ll t

bull Line f ress Ihi

wppl) Ii)

cJllceic r

bull Man Press th imiddot

wllh Ihe I

The Lil

frequel

exceec

as sho

is not v

belowmiddot

over 5(

You cc

two me

6

PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

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QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

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Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

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to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

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La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

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VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

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INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

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TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

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Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

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PANEL DESCRIPTION

__________~__ _______------~~-----=-----~~7--------------------------______________~__________________~_____

B) (j) Noise Canceling Buttons ( A B) Hum Cancel Frequency Knob ( A B)

nitors ( A B)

fum Canceling vfonitors (A B)

h---r __ L_ I

I I MDII ~~ OR _

E _I HU Imiddot J Ilk ~ i88_ 8- illizi bull 1( 888_ ~L- I

_ ___ JL- _____ J

I circuits

rmine the

I - 18 and

ill not be

3 ) unction is

- is lit the

md

) the hum

Ilg or not

e (channel

will li ght

Noise Cancel Threshold Knob (A B )

reg Hum Cance l Mode Buttons ( A B)

- __ ___ J ---shy 1 I H~ middot A ~r- - shyI

Cit A

0rHRf5ttlkO

copy ill LJ IIIL co U I wcentI rRpoundQLNr MUA_ I

i II ][ LJ U I ell 8 lt1 ~

+8 L ___ _ ___ ______ -I B

Hum Cancel Threshold Knob ( A B)

Power SWitch

0 1gtlfI[ol D

(Q) POKeR

Do ( 0middot)

~-__=-N~ ISE LAI I CH A I

I I I I ~ I bull CH a l IoII I4 NI IL ___ ____ J

(j) Noise Canceling Buttons ( A B ) Thee bUllons switc h Ihe nois canceling funClion on II c1 of1

When on Ihe indicator wililighi

Noise Cancel Threshold Knob ( A B) Thi s kn ob SCIS the inpul level at which the nuise cancelt l ta n

workin g

reg Hum Cancel Mode Buttons ( A B) These bU llons select eilher the Lin e Frequenc or -larlu31 hum

cnee ling 111 od When seieclcd the indi calor w [1 light

bull Line Frequency Button Press litis bU llon 10 remove Ihe hum generaled by Ihe power

supply lille When il is lurned on the bas ic frequ cnc 0f Ill e hUIll

canl-e1er will gt Il~hro ni ze to Ihe power surply frequen

bull Manual Button Pres this bUllon 10 SC I Ihe bas ic frequerlcy of Ihe hum ca ncele r

wilh Ihe Frequency Conlrol Knob

bull The Line Frequency button covers hum noise whose basic

frequency is from 40 0 to 500 Hz When this range is

exceeded the button will flash and the display will respond

as shown below indicating that the hum canceling function

is not work ing

below 400 Hz LO F

over 500 Hz HI F

bull You can select a different mode for each ch annel but not

two modes for one channel at the same time

Hum Cancel Frequency Knob ( A B ) Th i sets the basic frequ ency for the hum callceer

Variable range 400 4QOHz ( 0 Ill z -1tIS )

49 0 - ~lJOH z ( 02H z siers )

bull When the Hum Cancel Mode is set to Line Frequency the

basic frequency is automatically set to match the power

supply frequency and therefore the position of the Hum

Cancel Frequency Knob is irrelevant

(j]) Hum Cancel Threshold Knob (A B) This knob adjusts Ihe input level al which the hum c~ n t ckr Iarb

wo rking

bull The Hum Cancel Threshold Knob works when either the

Line Frequency or Manual mode is selected

Power Switch This switches the S r 550 on Jnd off

bull When the SN-550 is switched on the Hum Cancel function

is automatically set to Line Frequency and the Noise

Cancel function is activated

7

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

bull PANEL DESCRIPTION

bull The fo lic lt Rear Panel gt

Q) Output lac ks (A B) CD Input Jacks (A B) c

c

Output Connectors ( A B)

CD Input Jacks ( A B ) Thc ~c ltI re ba lanced 14 incli gtleleO phone jacks Unbalanced inr lJl

( mono 14 inch phone plugs) call abo be connccled

(2) Input Connectors ( A B ) Thec re balanced XLR eonncclors These connltclor art secured

by si mplified stoppers and Ihercfore w ill nol be disconn ec lcd even

If ou pull lite conneCI r cabl 5 fai rl y hard

Output Jacks ( A B ) The e art balanced 14 Inch slereo phone jacks Unbalanced

oulpuls ( mono 14 inch phone plug ) can also tIe connecled

Output Connectors ( A B) These a le ba lanced XLR conneCio rs

bull Do not use the Input Connectors and Input Jacks ( or

Output Connectors and Output Jacks ) at the same time

damage could result

(2) Input Connectors ( A B)

The pin ass igntn enl s for Ihe XLR ltO IlIl ltC lo rs (and 14 inch phone

jackplugs) are as foll ows Before making any connlc lions

confinn pin assi gn meni Lo lllpalibililY w ilil a ll olh er de vice

Inpul Output

Q- CD GND

L HOT

() COLD - --- shy

Jack Plug

rI [ ~~HO _ yenTJrt---1lmmooo= Ring Cold ___ ~

Sleeve Ground --~

8

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

CONNECTIONS

bull CONNECTIONS T he fo ll ow ing are example connections

bull Connecting the SN-550 before a mixer If you w ish to remove the noise of connected instruments se t up tile SN-550 between the wh mi xer

and main mi xer as shown below By conn ecting th e SN -550 just before the main mixer the noise

picked up by the cables of the miers ca n also be removed

Keyboard sub mixer (eg M - 120) Drum sub Mi xer (eg M - 120 )

a a a a a a

SN - 550

1 1l-=~ o copyIsect1~sect~=t1-==~~~~~1 From the Output Jack

or Output Connector From the Output Jack

r==J= copy copy o D

or Input

iI copy copycopy 0ILshy0 COOMO ~

lCh phone

nncc (ion s To the Input Jack

CS r o r Input Connector

- 11 o 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ITIJl o Q OOOOOOo o oo o o ocooo oo oo 00 0000 00000 0 000 000 000000 0000000000000000000000 00 0 000 000 000 00 00000000000000

ggg gg g gg gggggg~gg og~ggggggg

O ~ ~~~~~~~~~~~~~~~~~~~~~~ o~o

+++++++++++++++++++++++1 H Main Mixer (eg M - 24E)

000=

bull Connecting the SN-550 to the Channel Insert Jack If you wi sh to remo ve hum or nOl sc of a spec ific channel connect th e SiJ -550 to th t han nel Insen

Jack

Mixer (eg M 24E)

I~ o 0 0 0 coo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11111 0010000000 00 00000000000OJoo middot)O O Oooooo o ooooo~ D O oOuo o oooooooooooooooooo OODO~OOOOooocooooooooc ~ ocoa

SN - 550gggggg ggggggggggggggggggogg OOOODO 000 00 00 0000 0 0 00 0000 coco ccoooocaCCCCOCQC DOOpa

+++++++++++++++++i++++++ Channel Insert Jack

Connection Ca ble PCS 31 (S tereo 1 4 inch phone plug Mono 1 4 inch phone plug x 2 )

s

9

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

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U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

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CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

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ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

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SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

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Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

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BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

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NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

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FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

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SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

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GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

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HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

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ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

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TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

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EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

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BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

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MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

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La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

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SA I lqrHt It IH 1111(111 IIlJlruJ 111

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HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

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KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

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SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

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VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

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INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

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TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

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SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

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Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

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I I fP I III n iH

As o f )1111 2H ]l)(J)

Mixer (eg Mmiddot 24E) From the Master Out

To the Input Jack or Input Connector SN-550

11 =11

From or

a

CONNECTIONS

bullConnecting the SN-550 between a mixer and

power amplifier on

Ir yo u wish to remove the hum Or noise caused by a va riable lighting sys tem or computer or noise (SI

picked through a microphone or white noise in the overall sys tem connect the S middot550 just before the

bull Connecting the SN-550 to Whcn you use an effect unit you can obtain successful result s by using the -550 twicc as shown

bclow bull If you

and hLWhcn you use a delay or reverb un it connect the SN 550 just before it ( If you connect the SNmiddotSSO

after the delay or reverb the reverheration time may be shonened ) When us ing a multimiddot effects unit

connect the N-550 to the SendRetum Jack and set it so that the delay reverb wi ll be connected just

before the SN- 50 In this case to minimi ze sound deterioration and maximize the effect 1I c onl y lt Te th e noi se canceling function in channel A and both the noi se and hum canceling functions in channel by I

To rem u

cJueJ r B

SN - 550

Output A

0Ej-Ej-tj00 Com presser Dis tortion Equalizer

Chorus etc

Input L~OO2J~~OO OOO OllO o ~t- bull bull

Output B

(f Guitar Amplifire

IJC-120)

-[ l [ r Output =-

indi c~ tec

frequcnc

G) PrE

will

can

~ Wit Thr

the

Car

pro ~

Delay Reverb etc

power amplifier

ooocOOOOOOOOOOOO O OOOO oOITITDocooooooo o o o oooo oo o o oooo 000000 ) 000 0 00000000 0 0 00000000000000 0 000000 00 0 cccoo O OCOOOODOOOOOO O Q OO OO OC 0000000000000000000 0 0 00 000deg 00000 0 00 000 0 000 0000 0 0 0 000 c

~t+ttt+ttt+ ~ttf++tt++++tt ~

Output Connector

a guitar

Power Amplifier (eg SRAmiddot 2400)

To the Input Jack or Input Connector

the Output Jack

bull ThiS U

boef Ir

opera t

When I mode

a u to m

(2) Fe

Le

rei

sh(

th e

bull When

proce~

se de l

10

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

bull SETTING

d

r or noise

before Ihe

e as sl1uwn

ho -550

ffects unit

necled jusl

t use only

In channel

I)

Sf IIINGS -----~~---~------~-----

The followll1g e (llail h Ihe hlt tll ings 0111 Sflt ~~()

G) Switch on the SN-550 and the connected units Switch

on the pow er amplifier ( or guitar amplifier ) las

(Switch the units off in reverse order )

bull This unit is equipped with a circuit protection device A

brief interval after power up IS requi red before the unit will

operate

bull WI1en the SN-550 is sWitched on the Line Frequency

mo e in the hum c nceler and the nOIse canceler will be

aulom lically s lected

(2) Feed the audio signal into the SN-550 Set the Internal

Level Control Knob so that the Internal Level Meter

reads between _ 18 and OdB the CLIP indicator

should not light When using a stereo signal set both

the channels to the same position

bull When the CLIP indicator is lit the signal is not being

processed properly

Set each channel of the hum and noise cancelers

depending on the conditions

bull If you change the internal level after having set the noise

and hum cancelers set each threshold level again

ltTo remove the hum caused by power supply linegt To remove the hum picked up th rough a microphone or guilar or

du sed a allab le li ghling sySlem se l Ihe hUIll can re icl- asbJ Indi cated below If the hum has not been reduced set the basic

fl-equency usi ng Ihe [I Jllual 111 0Ue ( See neXI column )

G) Press the Hum Cancel Line Frequency Button (ThiS

will automatically adjust the basic frequency of the hum

canceler to the power supply frequency )

(2) With no audio Signal present rotate the Hum Cancel

Threshold Knob clockWise from the MIN position so that

the hum disappears

While an audio Signal is present adlust the Hum

Cancel Threshold Knob find the position which

provides minimum tonal alteration

lt To remove hum from other sourcesgt To remove Ihe hum caused by a CRT digtplay or compuler ( Ihal is

not related 10 Ihe power surfl ) frequell cy I Sci Ihe hunl calleci el

as follows

CD Press the Hum Cancel Manual Button

(2) Set the Hum Cancel Threshold Knob to the MAX

position and adjust the basic frequency uSing the Hurn

Cancel Frequency Knob until the hum disappears

With no audio signal present rotate the Hum Cancel

Threshold Knob clockwise from the MIN pOSition until

the hum disappears

While an aUdio signal is present adlust the Hum

Cancel Threshold Knob find the position which

proVides minimum tonal alteration

ltTo remove white noise hiss noisegt If yuu wish 10 remO Ve Ihe while noise generaled b Ihe connec led

uni ls or noise picked through a microphone or analogue lape hi ss

set Ihe noise canceler as follows

(j) Press the Noise Cancel Button to turn on the noise

canceling function

(2) With no audio signal present rotate the Noise Cancel

Threshold Knob clockwise from the MIN pOSition so that

the noise disappears

While an audiO Sign al is present adlust the Noise

Cancel Threshold Knob find the pOSition which

provides minimum tonal alteration

lt To remove hum and noisegt I f noi se or hum is heard while no audio signal is prescnt fi r1 sel

Ihe hum canceler and Ihen the noise can celer While an audio

signal is presenr sel each Ihresho ld level of each channel gain

find seilings which degrade Ihe inpul igndl as lillie as possible

bull The SN-550s hum canceler circuitry appears first in the

sign al path Be sure to set the hum canceler first then the

noise canceler

II

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

e

shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

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( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

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PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

bull SPECIFICATIONS 1 Inforrbull SPECIFICATIONS Vi II II Ie

bull Signal Processing I) middoton troion 16 bi l lin cr

I) C OI I l ri II middot 18 bil equivalen l

( Digi lal Comrandin g )

bull Sa mpli ng frequency -1 1-11

bull Frequency R~ sronse

20 II I 1() I- Hl ( + 02 dl l )

bull Nominal InputOu tput Lev el 20 11 113m ( balallcld inrul and oUlrul leve l is l he Slm(middot )

aminal Inpu l OU IPU I L eve l =1lax irnum l~ v cJ - t4 dB

() dBIIl = 0 - 75 nllS

bull M axim um In pu t Output Level +24 dHm ( halanced in pu l oulpul inl emal level MIN)

bull Input I mp~d a n cc Ha l ~n ced I IiPU I 20 H 2

l nbd lancld IIiPUI 10 k Q

bull Ou tput Im pedance Ua)allnd ( )Ul pU I nOO Q

l nhdanccd OUIPU I 300 Q

bull Total Harmonic Distorti on Less II1n O()2 (al I kHz +4 Jl3 111 lIominal inpu l

N Rati o

I )) c II1n Ro dB ( 1I-IF- 4 cl Hrn nom in 1 in pul

bull Dynam ic Range I lore Ihan 94 dB

bull Controls Inlcmal Lcmiddotc- Cont ro l Kn oh x 2

joise Cance l BUlion x 2

Noi e Ca ncel T hresho ld Knub x 2

Hurn Cancel Line Frc4uenc Bullon x 2

Hurn Ca nce l Manual BUI lon x 2

Hum Cancel Frequency Knob x 2

Hum Cancel T hreshold Kn ob x 2

Power Sw ilch x t

Byp Sw ilch x l

12

hown IJ

U S A bull Di sp lay Roland C

-011 1gtnlI COT pc

~j I~

If I

11 ~ l ~ I

bull Indi ca tors Bypass Indicalor CANA D

Rola nd Coisc Cance l I nliicalors ( ch A eh B ) lid

Hum Cane I ille Frequency Ind ica lors ( eh A ch B ) (Hed Of H fJ11~ Hum Ca ncel 1anual Ind icalors ( ch A ch B ) h1 hllI l l

fll middot IIJbull Connectors Ba lanced Inpul lack ( 14 inch siereo ph one Iype ) X 2 Roland C

lid Cla lil nced Inpul Conneclo r ( XLR Iy r c ) x 2 (Monlreal

Ba lanced OUIPU I Jack ( I l 4 inch Slcrco phone Iype ) A 2 11- I rI

bull r11 k I l3a lanced O Ul rUI Con nec tor ( X LR lyre) x 2

lddwl r II

III II

bull Power Supply Roland C

JC I t - gt ( 220 N 240 v lid (Toronlo H l1ln

bull Power Consumpt ion 32 w

AU STRA l Rol and Cbull Dim ensions

4 2 ( W ) Y 340 ( 0) x 44 ( fI ) mm AlIslralia H1 t lIojd

19 (W) - 13 j (0 ) x l - 34 ( H) inches Pf t h

( EtA- ) U rack rn ou nl Iy pe) 1 q~middot11 I IIr1

NEW ZEJbull Wei ght Roland C

48 kg lid 10 5 1bs 1 1111

1Ji llll1d 1I (1ft 11

bull A ccesso ri es UNITED I

Uwners rvlan ulaquo1 Roland (L Jj ell P III I I I

bull Options III I I II 11 p Sy ~ (m Rack middotmiddotmiddotmiddotSYR- IO

Hard Casemiddot TB-2U4L ~ Umiddot 1 2U Roland (L

Swansea ( IIIIU( ( I 11111 flHI I 1 llltIbull In Ihe In teresl of product improvemenl Ihe specifications l IIIHI

of Ihis unit are subject to change Without prior notice rl J middotn-I

ITALY Roland II Idl tlllf

WIflII 111 middot 1 gt1

SPAIN Roland EI Es pana s (liltmiddot Hoi H1I1middotlnn1

fl i II 1I1

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

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U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

Information VVhen YOLi Iletd rcp )ir service ca ll your 10c)1 Ro lmci ) rviu 51011io ll or lilt 1111 i1 ()11 Ltd flt011I1d d is tri blltor in your l nUllt ry 1

117 112lJ

lications

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shown bel ow

U S A Roland Corporalion US - Ol ) r)j Ilmiun ( Ide

t nijlk ( 1(10-111 IflLth l 1

n I f I hB I ) I I I

CANADA Roland Canada Music lid (H N d Oirice) llfC1 PIII~ [lod l~

Iolt hll1ul1d ij C 1 1 l I

II f111 - hlfI

Rol and Canada Musi c lid (MontreaIOfii ce) lJ 12 I 1I11dl(un

tl ( fd gt1 I IIUIIII

)101 II~ IVI I middot - IJ I I 11 ll _I t

Ro lnd Canada Music lid (Toronto Offi cel t H Irlnl ll1I

~ 1011 I 11111 I I 1

I I ( I) I 11( H1I1 1111

AUSTRALIA Ro land Corporation Auslralia Ply Ltd Pi ( II11I1 U fH1I

h 11 1 - ) l tl~I J

II I ~ I II 1)- ltH ~ 1i1

NEW ZEALAND Roland Corporal ion (_ Z)

lid q 1 I Ir ll f 11Id 1 I drll - 11 I -11 I I II 1 I ) rr I Itt - 1l4 H - 1

UNITED KINGDOM Ro land (UK) lid ~ j ( IIt tmiddot 111 Ilf HUmiddotmiddotImiddotjmiddot

1 k J 11 11 IIIp I111 ( Il I III I 1- III ~I ( I II 1 I[ I) 1 I t01Jt-

Rol a nd (UK) ltd Swansea Office ILlnlll (ftl ~W bullbull ll l1

lkqHI t PilL 111 1

I ( IUtlll~~II 1 11 [

rIIHIII(IIlt

J t 0 I middot110 I ~tt

ITALY Roland Italy S p A 111 11 111 Inllu IOI ~ HO 1

tltf1 11 1 1 1 I II II H-H II

SPAIN Roland El eclronics de E pand S A I 11k nll[ I -I I IHtl t

Hltl fllI I ~ I 1 1l lp I IW~ I ItOIl

GERMANY Roland Eleklronische Musikinslrumente Ha ndelsgescllschaft mbH 0 1111)5 LJh WUO NI)r(J N l( cli lt tR -middotNY r EI 011)1 (004ll

FRANCE Musikengro )(V Al1ue ) an-JHJ r(

(J lHl fJ 7 I ~ ()f1 (Cl k 07 I R CE rH 17) 8SRmiddotj middot1 amp11

Musikengro (Paris Office) ( (gtnlfL PAiun PtfisiLnnt -41 HIi l hq l -F lJllriN [) I HJO

VI 15[111 I RANll If I I ) I flO Bf 1gt2

BELGIUMHOLLAND LUXEMBOURG Ro la nd Benelux N V I h)lllr~I Jt I B ~()O ()~ I - 11 1110 BE Jlt J ILt IrI IOrJ121 I I 7 811

DENMARK Ro land Scandinavia AS I tl n Jcl lropd(l (1 flu x Cj - I) lOll pnhqln K I II middot RK ffI I I I jil l

SWEDEN Roland Scandinavia AS r1~lOf llt~n If ~ B J rr

I II 10 NJrk WI 0 1 f11nRmiddot11 2 IK )lrJ

NORWAY Ro land Scandinavia Avd Konl o r Norge lIUflk(r(~ In I Jn~llgtn ~ 1 1

I dltIPf i 01 1h OJu 2 ( WIN I I

I II ~c- l i(1middotj

FINLAND Faze r Musik Inc 1 luuItJn lll P( )l3 lhl)

~I (1 111) l II gt I I Ngt III (1 -11 i( I I t

SWITZERLAND Musitronic AG ( (rlllmiddot lr middot j ( I t -1-1 10

1~LI I SWI TZI RI l nt Ilid 02 1 I ( I

Roland CK (Switzerland)

AG r () Hm l lndt r L~t 1

( 11- ~ ) 1I111~ln cBI ~ II [RI 1 NI) ill hi 171 Mil 1111 ~ jlll1 middotf h~ orlltllnn C

AUSTRIA E Demalte ampCo ~ 1U- ~LJm lwllh rb lrI

flU I Illn lu w I Po Hox Ii ALI 11~1 -1 111 1lr1 1 2hmiddot~ 1 hU

GREECE V Dimilrildi amp Co Ltd 10 It till I ~ 1 lt lflU- 111111gt (j~11 ( 1 111 111M I I

PORTUGAL Casa Caius In s trum ent os Musicais Lda u rk t l 1 ( 11 lI i1l 1 I 1

-41)011 1)0111 Pt JRII ( 1 n I Ill - 1M middot1I (

HUNGARY Intermusi ca lid IfPianthl 1--11 JlI j

lIJrohlllnl B loll I

II I middotil middot R~

III 1 I UbJ H

ISRAEL DJA Inl e rnalion al ltd I I IJ ~H ( I 1 lei h N lt If I III l ) ~ I n l l If

CYPRUS Ra dex Sounri Equip ment lid I nll~CJ III II I 1 1) Ul n O-1 h N ltoJ 1( IU 1[L i i I 1 11 I )

UAE Za k El ectron ics amp Musical Instr ume nts Co P() l11) Srt m 1111 l I I H L hfJ ) -- I

SAUDI ARABIA Omar Badoghaish Trading Corp P( l HIl iall ltlLl lh ~ t 1)1 k Ill I III ltJh) II I Itll lUI

KUWAIT Easa Hu sai n AI-Yousiii p ( ) Hi) I ~ 1 11 L I I KUI I II 1Ft l J h~ 11j~middottmiddotJ

LEBANON A Chahine amp Fil ( 1 () Bil If I IWishy

1Ir t rIlIV) III II -1-

TURKEY Barkat Sanayi ve Ti cHet If(1 Ic middot ( III HI I 11II1J

h I 111 I rt ~~I ~ TI r III J I

EGYPT AI Fanny Trading Oiiice lt) j IUl I II~ Ir 1111

~l rtmiddot1 -111 Il l nl I hmiddotIIIJ111111 ( 0 II 1 ~I

r PI TIt It HI 1-11

QATAR Sadie St udio amp Sl o res p ( Ho lo h I

Ih lH l Il1f II t middot I~ It 4

BAHRAIN Moon Stores Itd 1HI IIIw ~J II I 1 1)H OH ~lllj III Hllulin nt t(II I -~ II Hili

BRAZIL Ro land Bras il lIda f -hlrfIH 1 II (111 III]

1 111110 II~ f lr

111 ( III 1III I III Iolp ~ to I

ltt

Oliver do Brasil SA In sl rum ent o s Jrusicais R 111111I1IUl ItI JI1I 1

(flill IHfl 01 0 I I jmillI 1

HIlL ILI In Iuhl H 11 III I11 I I HI I- I 1

to( III 1 rt HI ) 1 1111

MEXICO Clgta Veerkamp sa de c v t-11 PIH~ II ( ( I I (r nl l[1

l r xu () () 1l ()lllil

I ~ I I-II

La Casa W agner de Gu1dllaj ara 51 de cv (1IHIIl1 r 2U -) ( II 4110fl ( IJtI l I

1 IIltL 11 1 If ()

II I II I I

VENEZUELA Mu iciand Digitl CA

I r middot )1 ~[O r)( 1 1 11

( Inl lfl 1 IP l tH ( n I1 1 ( ~ tUL 11 ll ( HH I

r middot 11 II I I I raquoll shy

PANAMA Producto Su perilc SA I ntlf lll fl) I IQII I I

RI P 1)1 1- 1 fll il 1 t

ARGENTINA In st rum c ntos Mu~ ical es

SA I lqrHt It IH 1111(111 IIlJlruJ 111

middotIK( IiI III I PI-I II I t l

HONG KONG Tom Lee Musi c Co ltd Service Division 2- I 11111 h tr ~I I r lIlll 111 ~ rflll4II

I If 1 r ) ~ 111 middot I I jl ll

KOREA Cosmos Co rporafi on Se rvice Sial io n li t 2 uil lotll 110 lI n

A rl I lul1g ~fl hu 11[11

() ~I middot1 III III -II Hil i I

SINGAPORE Swee Lee Complny lUll 1 21 B I II Crt 11 1211 ~ t

(hImiddot HI~h ( 1llpll middot

j I~PU ( UIM I f I iJhAHl

PHILIPPINES GA Yupangw amp Co Inc I It l d I P~ldl 1111111 middot

1I~ III lICI1 Irl I I i j I

I 1111111 1rt IJ HI Pil i e

THAILAND Th(era Muic Co Ltd III middot11 middot~ I~JIII ~ lIIlt

IJI bullbull Hl bJk IIiHIl III 11 I r I I I l l fl~ I t

VIETNAM Sa igon Music Dist rihut nr Ifl J nHtl liln Ph

tqj IJ lIlt t

I lu hi tlk (JI I( In[ )

H I X PI -Ib Ij- j

MALAYSIA Syarikat Bentl e y r I ) 1 1(111 [i ulll BInt III~

11 ) r)I IIIo 1 1111I111 1

) I~ I n l n I ) I) 1 ~ 5

INDONESIA PI Citrarama Belanlika II L I dlll~ l Ii I - lrmiddot I I II r l

I-Ill 11 111 I I Hil l I I(

li1l1 (Imiddot

TAIWAN Siruha Enterpr ise (Tailn) Co LTD HIli I IHI I I I hi II

~I In - ~nld t ( I II I

I 1 ~ I III 111 -I I-Hli

SOUTH AFRICA That Olher Music Shop tPTY ) Ltd 1 r 11t 1 middotmiddot1 ( nl 1t 111

Illd 1 I 111 f 1

Hr I 1111 Ill lnl I

1plhlll 1111111 l fll i

If I ~ II 1IH 1 111

Paul Bothner (PTY) lid 1- f rdI11uimiddotr I r Ir middot ( r~1 Inn tlll

k1PllhII C 01 ou111 IIt

I I fP I III n iH

As o f )1111 2H ]l)(J)

--------------- - - -

r----------------------------------------------------------------------ForVVest Germany

Bescheinigung des Herstellerslmporteurs Hermit wird bescheinigl dall derdiedas in Ubereinstimmung mit den Beslimmungen der

Rotand DIGITAL NOISE ELIMINATOR SN-550 lrntbL Jfg 1 0~6198~ fGed l Typ Bezelchnunql tAmlSbll l1 verlugungl

funk-entstort ist

Der Deutschen Bundespost wurde das Inverkehrbringen deses Gerates angezeigt und die Berechtigung zur Uberprufung der Sene auf Einhallung der Bestlmmungen eingeraumt

arne es Herslellers1lrnpol1eurs

For Ihe USA

FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT

This quipment has be n tes ted and found to comply wi th the limits lor a Class B digi tal devic(I pursuanl to Part 15 of IIle FCC Rules These limits are designed to provide reasonable protection against 11arrnfuf interf rence 111 a residential installation This equipment generates uses and can radiate radio fr equency energy and if not Installed and used In accordance with the instructions may cause harmful interference to rad io communications However there is no guaran tee tll at interference will not occur in a particular installation If this equipment does ca use harmtut interterence 10 radio or television r cepti on wll ich can be determined by turning the equipment oft and on the user i encouraged to Iry to corr ectlhe inlerlerence by one Or more ot the following measures

Reorient or relocate the receiv ing antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a clrc uil differen t from that to which the receiver IS connected Consult the dealer or an experienced radiotTV techniCia n for help

Unautllorized changes or modification to this system can void Ihe users authority 10 operate th is equipment This equipment requires shi elded Interface cables in order to meel FCC class B Limil

r------------------------------------------------------------------------ForCanada~

CLASS B NOTICE

This digital apparalus does not exceed the Class B limits tor radio noise emlS Ions set out in Ihe Radio Interference Regulations of the Canadian Department of Communications

CLASSE B AVtS

Cet appareil numerique ne depasse pas les limites de la classe B au niveau des emissions de bruits radioelectriques fixes dans Ie Reglement des Sign ux parasites par Ie ministere canadien des Communications