Four Channel Front Output RCA Ports Two Channel Rear Output RCA Ports Trunk Mount Chassis Design Infinitely Adjustable Crossover Points from 32-8kHz Frequency Multiplier for Front Channels Dual Input Capability for Front Rear Inputs Independent Gain Control for Each Channel Subwoofer Phase Adjustment Switch from 0 to 180 Degrees Fully Isolated Shielded DC to DC Power Supply Separate Subwoofer Input Woofer Equalization Switch: 12dB Boost at Selectable Frequency (45Hz/80Hz/120Hz) Dual In/Out RCA Ports for Installation of Multiple Crossovers Manufactured from Composite Resin Materials Frequency Response: 20Hz-30kHz Distortion 0.015% THD at 1kHz S/N Ratio than 98dB Crossover Slope Rate 12dB per Octave 2nd Order Butterworth Dimensions: 5.42'W x 8.91'D x 1.83'H