Polk Audio PA D1000.1 Class D MOSFET Monoblock Mobile Audio Amplifier; 500 Watts RMS @ 4 ohms, 800 Watts RMS @ 2 ohms and 1200 Watts RMS @ 1 ohm; Remote Subwoofer Level Control Super-efficient class D designruns much cooler than conventional amps High-speed MOSFET switchingPower supply with outputs stable into 1 ohm loads ProtectionThermal, DC offset, reverse polarity and short circuit protection Nickel-plated wire terminals & RCA connectorsEnsure maximum signal transfer Level controladjusts the gain of the channel to match the output voltage from your head unit