Behringer FBQ3102, Audiophile 31-Band Stereo Graphic Equalizer Condition:* Used, Removed From Service In Working Condition.* Tested Fine For Basic Operation. As Pictured.Additional Notes:* Professional 31-Band Stereo Graphic Equalizer for live and studio applications* Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer* Dedicated mono subwoofer output with adjustable crossover frequency* Additional sweepable high and low-cut filters for each channel remove unwanted frequencies, e.g. floor rumble, hiss etc.* Highly accurate 12-segment LED input/output metering and input gain controls for easy level setting* Ultra-low noise audio operational amplifiers for highest signal integrity* Relay-controlled hard-bypass with an auto-bypass function during power failure (failsafe relay)* Servo-balanced inputs and outputs with 1/4″ TRS and gold-plated XLR connectors* Shielded toroidal power transformer for ultra-low noise performanceBehringer FBQ3102