The VAD10004 4-Channel Full-Range Amplifier is water and weather-resistant and will provide up to 1000W RMS power, split between four channels - such as four car speakers, or split between two channels - such as two powerful subwoofers. This 4-Channel Amplifier is built to last in marine environments and can withstand moisture and damaging sun rays. Comparable to Rockford Fosgate P600X4, Polk Audio PA D4000.4, & JL Audio RD4004