Pyramid PB615X 1600 Watts 4 Channel Bridgeable Amplification Four Channel Bridgeable Amplification - MOSFET Pulse Width Modulated Power Supply - Signal/Noise Ratio 90dB - Short Circuit Protection - 240(D) x 81.3(H)mm Tri-way Configuration:4/3/2 Channels - 2 Ohm Stereo Stable - THD Less Than 0.04% - Power On LED Indicator 4 X 400 Watts Total Output @ 4 Ohms - Built-In Variable Subwoofer Crossover - Frequency Response:15Hz-30kHz - LED Diagnostic Condition Indicator 1600 Watts Total System Output @ 4 Ohms - RCA Low Level Inputs - Overload Protection - Automotive Type Fuse Protection Variable Gain Control - Speaker Output Terminal Strip - Thermal Protection - Dimensions:11.02''L 9.45''W 2.09''H