• GEQ 131: 1 Channel, Single Rack Space, 31—1/3rd Octave
Bands
• GEQ 131LF: 1 Channel, Double Rack Space, 31—1/3rd
Octave Bands, Long Throw Faders (60mm travel)
• GEQ 215: 2 Channel, Single Rack Space, 15—2/3rd Octave
Bands Each Channel
• GEQ 215LF: 2 Channel, Double Rack Space, 15—2/3rd
Octave Bands Each Channel, Long Throw Faders (60mm
travel)
• GEQ 231: 2 Channel, Double Rack Space, 31—1/3rd Octave
Bands Each Channel
• Active balanced (XLR and 1/4" TRS) and unbalanced (RCA)
input/output connectors
• Constant Q bandwidth from each filter with a 3% center
frequency accuracy
• Parallel filter design for minimal phase distortion
• Ultra low-noise circuitry
• Variable low-cut and low pass filters, 12dB/octave (GEQ 131/
131LF/GEQ 231), switchable filters (GEQ 215LF)
• Selectable range 6dB or 12dB
• Variable input level control
• Equalizer ON/OFF bypass switch
• Peak (overload threshold) LED
• Internal power supply with AC input and selectable line
voltage (110-240VAC, 50/60Hz)
• Ground lift switch
• Power off automatic bypass function
FEATURES
WARNING
An equilateral triangle enclosing a
lightening flash/arrowhead symbol is
intended to alert the user to the
presence of uninsulated "dangerous
voltage" within the product’s enclo-
sure, which may be of sufficient
magnitude to constitute a risk of
electric shock.
An equilateral triangle enclosing an
exclamation point is intended to alert
the user to the presence of
important operating and service in-
structions in the literature enclosed
with this unit.
CAUTION!
TO REDUCE THE RISK OF FIRE, RE
PLACE ONLY WITH SAME TYPE FUSE.
ATTENTION!
UTILISER UN FUSIBLE DE RECHANGE DE
MEME TYPE.
WARNING!
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK. DO NOT EXPOSE
THIS PRODUCT TO RAIN OR MOISTURE.
DO NOT REMOVE CHASSIS (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
PERSONNEL.
3
GEQ 131/131LF
Single Channel 31 Band Graphic Equalizers
GEQ 215/215LF
2 Channel 15 Band Graphic Equalizers
GEQ 231
2 Channel 31 Band Graphic Equalizer
Graphic Equalizer GEQ Series
POWER
10
+12
+6
-6
+3
-3
0
-12
0
LEVEL
5
31 BAND GRAPHIC EQUALIZER
GEQ 131LF
GEQ 131LF
OFF
ON
BYPASS
CLIP
–6
–12
RANGE
40
60
15
250
10
HI PASS
15K
22K
7K
3K
50K
LOW PASS
20
31.5
50
100
200
500
1.25K
2.5K
6.3K
12.5K
25
40
80
160
400
1K
2K
5K
10K
63
125
315
800
250
630
1.6K
4K
3.15K
8K
16K
20K
