Black Diamond EQ7 DIN 7-Band Pre Amp-SQ.

EQ7 DIN 7-Band Pre Amp Equalizer /Front Rear + Sub Output Exclusive Black Diamond Design Main in and AUX inputs with switchable modes so you can select two sources Easy and compact mounting so you can adjust your audio on the fly with a simple twist of a knob Front, Rear, and sub outputs so you can completely tune all your amplifiers from one crossover