Four Channel Bridgeable Amplification, Tri-way Configuration:4/3/2 Channels, 4 X 400Watts Total Output @ 4 Ohms, 1600 Watts Total System Output @ 4 Ohms, Variable Gain Control, MOSFET Pulse Width Modulated Power Supply, 2 Ohm Stereo Stable, Built-In Variable Subwoofer Crossover, High Level Low Impedance MOLEX Input Connector, RCA Low Level Inputs, Speaker Output Terminal Strip, Signal/Noise Ratio 90dB, THD Less Than 0.04%, Frequency Response:15Hz-30kHz, Overload Protection, Thermal Protection, Short Circuit Protection, Power On LED Indicator, LED Diagnostic Condition Indicator, Automotive Type Fuse Protection, Dimensions: 11.02''L 9.76''W 2.26''H