BOSS AUDIO Pre-Amp Equalizer with Subwoofer Output Sound control with up to 8 volts RMS of output Seven band equalizer with 18 dB boost/Cut Specific bandwidth for each band Low noise BI-FET op-amp design yields minimum distortion on-board 30 volt BI-Polar switching power supply Subwoofer outputs and level controls Subwoofer frequency selection switch (32Hz/64Hz/128Hz) Input selector for AUX or CD Universal half-DIN chassis for ease of installation Gold plated RCA input/output connectors 20 dB headroom eliminates signal overload Blue light illumination Specifications Frequency bands: Front channel - 125Hz, 500Hz, 3.5kHz, 12Khz / Rear channel - 50Hz, 600Hz, 6.3kHz Boost/Cut: +/-18 dB Signal to noise ratio: 110 dB ref 1 volt input Frequency response: 1Hz - 15kHz, +/-1 dB Maximum output voltage: 8 volts RMS Total harmonic distortion: 0.05% Input sensitivity: 150mV Headroom: 20 dB Input impedance: 10k Ohms Stereo separation: 82 dB/1kHz Operating voltage: 11-15 volts negative ground Output impedance: 50k Ohms Dimensions: 1" x 7" x 4-9/16" / 27.5mm x 178mm x 115mm