Lanzar OPTI2000D Optidrive 2000 Watt Half Ohm Stable Mono Block Digital Competition Class Amplifier RMS Power Rating: 4 ohms: 700 watts x 1 chan. 2 ohms: 1100 watts x 1 chan. 1.3 ohm: 1600 watts x 1 chan. Max Power Rating: 0.5 ohm: 2000 watts x 1 chan. Max power output: 4000 watts x 1 chan. Pulse Width Modulated MOSFET power supply Wired remote bass level control included