Stereo System User's Manual
8
Specications
EQUALIZER: 
Equalizer Control Bands 
1X31, 1/3 Octave ISO Spacing From 20Hz to 20KHz 
2X31, 1/3 Octave ISO Spacing From 20Hz to 20KHz 
2X15, 2/3 Octave ISO Spacing From 25Hz to 16KHz 
Filter Type 
Constant Q 
Slider Travel 
20mm (Center Detent) for GEQ 131/215/231 
Level Control Range 
+/-12dB 
INPUTS: 
Type 
Active Balanced/Unbalanced 
Connectors 
3-Pin XLR, 1/4” TS (Balanced)
Impedance 
40K Ωs Balanced; 20K Ωs Unbalanced 
Maximum Level 
28dBV 
OUTPUTS: 
Type 
Unbalanced 
Connectors 
3-Pin XLR, 1/4” TRS 
Impedance 
Typically < 400 Ωs 
Maximum Level 
+/-20dBV 
Clip LED Threshold 
3dB (Below Clipping) 
Low Cut Filter 
40Hz, 12dB/octave 
Frequency Response 
20Hz - 20KHz, +/- 1dB 
THD + Noise 
<0.008% (@ 1KHz, all faders at mid position) 
Signal to Noise Ratio 
95dB (@ 1KHz) 
Channel Separation 
60dB (1KHz) 
Line Voltage 
100-130V AC, 50/60Hz 
Power Consumption 
Maximum: 15 watts 
SIZE: 
19” W X 3.5” H X 5” D (2U)
(48.2cm X 8.8cm X 12.7cm) For 231
19” W X 1.75” H X 8.66” D (1U)
(48.2cm X 4.4cm X 12.7cm) For GEQ 131/215
WEIGHT: 
4.15lbs. (1.9Kg.) GEQ 215 
4lbs. (1.81Kg.) GEQ 131 
6.85 lbs. (3.1Kg.) GEQ 231 
The specifications above are correct at the time of printing of 
this manual. For improvement purposes, all specifications for 
this unit, including design and appearance, are subject to 
change without prior notice. 










