Skar Audio engineered the SKA7EQ 7 band 1/2 DIN car audio graphic equalizer so that you can finally take full control over your car audio listening experience, dialing the sound into perfection. Featuring two sets of RCA inputs (main and a selectable auxiliary input), this EQ takes your input signal and allows you to modify and adjust the sound to your liking. The output signal is then delivered via the high voltage (up to 7V max) pre-amp RCA outputs for the Front, Rear, and Subwoofer channels (the subwoofer out-put channel features an independent volume control knob on the front of the unit as well). 7 fully adjustable -12 dB to +12 dB EQ bands (50 Hz, 125 Hz, 320 Hz, 750 Hz, 2. 2 kHz, 6 kHz, 16 kHz) with built-in fader control.