Power Acoustik RZ4-2000D 2000W Class D 4 Channel Amplifier 2000-Watt max power, 160-Watt X 4 at 4-ohm, 250-Watt X 4 at 2-ohm, 500-Watt X 2 at 4-ohm bridged 4-Ohm bridged/2-ohm stereo class D full range MOSFET PWM power supply