Definitive Technology In-Wall SubAmp 600 120v Amplifier (Single, Black) Single high powered subwoofer amplifier for use with IWSub in-wall subwoofers Power output: 275 watts/1 channel, 230 watts/2 channels Features two discrete high power amplifiers with simple connections in one convenient housing Provides optimal power for effortlessly driving one or two IWSubs in the same room or in different zones The high quality finish is available in silver or black