Fusion MS-DA51600 5-Channel Marine Amplifier, 1600W Class-D Technology - High output, greater efficiency Conformal Coated PCB - water resistant coating protects from salt and moisture 1 Piece Die Cast Heat Sink - improved thermal transfer for greatest reliability and longer sustained power output and durability 5 Way Circuitry Protection - Thermal/Reversed Power Polarity/DC Offset Protection/High + Low Voltage - FLFC Low Frequency Control 1600 watts max - 80 watts RMS x 4 + 250 watts RMS x 1 at 4 ohms