Lanzar OPTI4000D Optidrive 4000 Watt Mono Block Digital Competition Class Amplifier<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>RMS Power Rating:4 ohms: 2000 watts x 1 chan.2 ohms: 3000 watts x 1 chan.1 ohm: 4000 watts x 1 chan.</li><li>Pulse Width Modulated MOSFET power supplyWired remote bass level control includedLED power (green) and protect (red) indicators</li><li>Variable Bass Boost (0 to +18 dB)Soft Start Turn-on</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41no3ayFQ8L.jpg" noproxy>