Soundstorm SSL S4EQ 4 Band Pre Amp Graphic Car Audio Stereo Equalizer EQ w/ Knob

This S4EQ Equalizer from Soundstorm Laboratories (SSL) is a 4 band Pre-Amp Equalizer for your car audio needs. It includes EQ Bands of 40Hz, 150Hz, 1khz, 20kHz with a dual 2 Ch source input. It also includes front, rear and sub outputs.