BOSS Audio MR800 Marine Grade 800 Watt, 2 Channel, 2/4 Ohm Stable Class A/B, Full Range, Bridgeable, MOSFET Power Supply Amplifier with Remote Subwoofer Control 400 W MAX Power @ 2 Ohm x 2 Channels 200 W MAX Power @ 4 Ohm x 2 Channels 800 W MAX Bridged Power @ 4 Ohm x 1 Channels RCA Low Level Inputs, High Level Inputs, Fixed High Pass Crossover, Variable Low Pass Crossover Variable Bass Boost, Variable Input Gain Control, Input Sensitivity Selector, Remote Subwoofer Control THD @ RMS Output: 0.01, Channel Separation: 90 dB, Signal To Noise Ratio: 102 dB, Frequency Response: 6 Hz  50 kHz Dimensions: Depth 8.8 x Width 7.3 x Height 2.3 6 Year Platinum Online Dealer Warranty