Clarion EQS746 1/2 DIN Graphic Equalizer with Built-in Crossover 7-Band Graphic Equalizer 6-Channel / 7 Volt RCA Outputs (Front/Rear/Subwoofer) Adjustable Master Volume Level Control Adjustable Subwoofer Level Control 2-Channel RCA AUX Input with Adjustable Gain Selectable 12dB Low-Pass Crossover (60Hz or 90Hz) Gold Plated Terminals Dimensions:7"(W)  1"(H)  4"(D) This unit is exclusively for vehicles with a negative ground, 12V battery system.