Legacy LA1800DBK 1800 Watt Mono-Block Class-D Amplifier (Black) 1 x 1800 Watts Max Output - Soft Turn On/Off Circuit - Heavy Duty Aluminum Alloy Heat Sink - Fully Protected Circuitry 1 x 900 Watts RMS Output @ 4 ohms - 1 Ohm Stable - Line Out For System Building - Dimensions: 11.1''W x 2.2''H x 10''L Fully Adjustable Electronic Crossover - Phase Switch - Power & Protection L.E.Ds - Fuse: 30A x 2 Variable Bass Boost: (0-12dB @60Hz) - Variable Gain Control - S/N Ratio: &gt;100dB - Remote Bass Boost Controller Variable Subsonic Filter - Remote Turn On - THD: &lt;0.04%