Precision Power P900.5 900-Watt Phantom Series Class D Full Range 5-Channel Amplifier RMS Power Rating (14.4V): 4 ohms: 70 watts x 4 chan.+ 270 watts x 1 chan./2 ohms: 115 watts x 4 chan. + 440 watts x 1 chan./Bridged, 4 ohms: 230 watts x 2 chan. + 440 watts x 1 chan. Wired remote bass level control included and MOSFET power supply LED power (green) and protect (red) indicators Heavy duty aluminum alloy heat sink for extreme heat dissipation If the amplifiers output, that is connected to the woofer, provides DC current, instead of an AC music signal, HEAT is produced - instead of music. This heat burns the voice coil and destroys the amplifier.