1238CF/DF

1238

1234

1236

1 1.5 2 5 10

1.6 3.2 5 6.5 16.5 32 50 (ft)

8320

8030

8040

8050

1032

8260

8351

100100

8020

8010

8330

Listening distances and sound pressure levelsThe short-term and long-term sound pressure levels (SPL)listed take into consideration typical room environments parametersfor each product (ITU-R BS.1116-1 Recommendation):a) variable typical room volumesb) variable typical room reverberation times (RT60)

If the room reverberation time is longer, it will mainly affectthe long-term sound pressure levels that will be higher thanthe ones shown.

Not recommended distancesWhen the distance to the monitor is too short, summing of sound frommultiple drivers is not happening as designed, and this affects theflatness of the frequency response. A flatter and more stable frequencyresponse is obtained at a larger distance.

100100

100100

100100

100100

9792

9489

9388

9085

8984

100100

100100

100100

100100

100100

9796

9493

9291

8988

8887

100100

100100

100100

100100

100100

10195

9892

9690

9387

9286

100100

100100

100100

100100

100100

10198

9895

9693

9390

9289

100100

100100

100100

100100

100100

10597

10294

10092

9789

9688

100100

100100

100100

100100

100100

106100

10397

10195

9791

9690

100100

100100

100100

100100

100100

111102

10899

10697

10293

10192

100100

100100

100100

100100

100100

112103

109100

10798

10394

10193

100100

100100

100100

100100

100100

114104

110100

10898

10494

10393

100100

100100

100100

100100

100100

114104

100100

10098

10094

10093

110100

10999

10494

10393

112102

10797

10595

116111

110105

108103

120115

113108

111106

124119

118113

114109

10595

107102

110105

113108

10596

Short-term sound pressure levelsMaximum short-term sine wave sound pressure levelaveraged from 100 Hz to 3 kHz, measured in half-space,on-axis (no weighting).

Long-term sound pressure levelsMaximum long-term RMS sound pressure level, measured in half-space, on-axis, with simulated programme signal according toIEC 60268-5 (limited by driver unit protection circuit, no weighting).

M030 104100

100100

100100

100100

100100

10498

10195

9993

9690

9589

M040 100100

100100

100100

100100

100100

108102

10599

10397

9993

9892

355 m31'950 ft 0.21 s

365 m3

2'300 ft 0.22 s

375 m3

2'650 ft 0.23 s

365 m

32'300 ft 0.22 s

375 m

32'650 ft 0.23 s

375 m

32'650 ft 0.23 s

385 m33'000 ft 0.24 s

385 m

33'000 ft 0.24 s

395 m33'400 ft 0.25 s

395 m33'400 ft 0.25 s

3110 m33'900 ft 0.26 s

3110 m33'900 ft 0.26 s

3120 m34'250 ft 0.26 s

3170 m36'000 ft 0.29 s

3200 m37'100 ft 0.31 s

3400 m314'200 ft 0.43 s

Guide 1

Room volume

Room reverberation time (RT60)

Distance from the monitor (meters, feet)

Genele

c p

roduct m

odels

355 m

31'950 ft 0.21 s

(m)0.5 1 1.5 2 5 10 15

8340100100

100100

100100

100100

1101100

111101

10898

10696

10292

10191

385 m33'000 ft 0.24 s

8350 100100

100100

100100

100100

100100

110101

10899

10495

10394

395 m33'400 ft 0.25 s

Genelec Monitors

Listening Distance andSound Pressure Level

100100100100114104

1237 113107

108102

106100

106100

3125 m34'420 ft 0.27 s

100100100100115109

113104

30.3

110010010297

29186

100100102101

100100106100

106103

100100

100100117108

100100119109

104100

1001009190

1001009589

1001009491

1001009791

1001009890

1001009993

10010010195

10010010494

10010010394

10010010495

10010010596

10010010696

10010010098

10696

10999

110104

113108

117112

121116

9.81.0

109103

110102

Direct sound dominatesWithin this distance the direct sound from the monitor has a higher levelthan the reverberant sound in the room. Placing the monitor within thisdistance range is advantageous in minimizing the tendency of the roomreverberation to change the character of the monitored sound colourand affect the precision of stereo imaging. The level of the direct soundrelative to the reverberant sound progressively reduces as the distanceto the monitor increases.

Critical distanceThe critical distance is the distance where the direct sound from themonitor and the reverberant sound in the room have equal level inmidrange frequencies (approximately between 200 Hz and 4 kHz).The critical distance is affected by the room volume, the roomreverberation time (referred to ITU-R BS.1116-1 Recommendation),and the directivity of the monitor.

355 m31'950 ft 0.21 s

365 m3

2'300 ft 0.22 s

375 m3

2'650 ft 0.23 s

365 m

32'300 ft 0.22 s

375 m

32'650 ft 0.23 s

375 m

32'650 ft 0.23 s

385 m33'000 ft 0.24 s

385 m

33'000 ft 0.24 s

395 m33'400 ft 0.25 s

395 m33'400 ft 0.25 s

3110 m33'900 ft 0.26 s

3110 m33'900 ft 0.26 s

3125 m34'420 ft 0.27 s

3120 m34'250 ft 0.26 s

3170 m36'000 ft 0.29 s

3200 m37'100 ft 0.31 s

3400 m

314'200 ft 0.43 s

Reverberant sound dominatesAt these distances the reverberant sound in the room has a higher levelthan the direct sound from the monitor. This balance progressivelyincreases as the distance from the monitor increases.The monitor can be used in these distances, but the sound character isstrongly affected by the reverberation characteristics of the room, andthis has a progressively increasing effect on the sound colour andstereo imaging accuracy.

Not recommended distancesWhen the distance to the monitor is too short, summing of sound frommultiple drivers is not happening as designed, and this affects theflatness of the frequency response. A flatter and more stable frequencyresponse is obtained at a larger distance.

Distance from the monitor (meters, feet)

385 m33'000 ft 0.24 s

395 m33'400 ft 0.25 s

Genelec Monitors

Direct Sound Dominance

Guide 2

Room volume

Room reverberation time (RT60)

355 m31'950 ft 0.21 s

(m)1 1.5 2 5 10 153

3.2 5 6.5 16.5 32 50 (ft)9.8

1238CF/DF

1238

1234

1236

1.6

8320

8030

8040

8050

1032

8260

8351

8020

8010

8330

M030

M040

Genele

c p

roduct m

odels

0.5

8340

8350

1237

0.3

1.0