Stereo System User's Manual
2
Features........................................................................................ 2 
Warning ........................................................................................ 3
Installation .................................................................................... 4
Front Panel Controls & Connections ........................................ 5
Rear Panel Controls & Connections ......................................... 6 
Typical Set-Up .............................................................................. 7 
Sound Reinforcement Applications ............................................... 7 
Musical Instrument Applications .................................................... 7
Studio Applications ........................................................................ 7
Specications .............................................................................. 8
Notes............................................................................................. 9
GEQ 131: 1 Channel, Single Rack Space, 31 -1/3rd Octave 
Bands 
GEQ 215: 2 Channel, Single Rack Space, 15 -2/3rd Octave 
Bands Each Channel 
GEQ 231: 2 Channel, Double Rack Space, 31 -1/3rd Octave 
Bands Each Channel 
Balanced/unbalanced (XLR and 1/4” TRS) input/output 
connectors 
Constant Q bandwidth from each lter with 3% center 
frequency accuracy 
Parallel lter design for minimal phase distortion 
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Congratulations on your choice of graphic equalizer 
— you have purchased one of the finest graphic equalizers 
on the market today. This unit was developed using the 
expertise of professional sound engineers and working 
musicians. You will find that your new NADY AUDIO 
Equalizer has superior performance and greater flexibility 
than any other equalizer in its price range. Please read this 
manual carefully to get the most out of your new unit. 
Thanks for selecting NADY AUDIO as your choice in 
graphic equalizers. 
Contents
Ultra low-noise circuitry 
Low-cut lter at 40Hz, 12dB/octave, switchable,  
with status LED 
Band range: +/- 12dB gain 
Center detents on faders 
Variable input level control (+/-12dB) 
Equalizer ON/OFF bypass switch with status LED 
Gain status LED bargraph with peak LED 
Power switch with integral LED “ON” indicator 
Shielded internal power supply with AC 
Compact and durable all-steel chassis design 
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Features










