Audiobahn A 2200 HCX 2 - Channel High Current Power Amplifier 200 watts x 2 @ 4 ohms stereo 400 watts x 2 @ 2 ohms stereo 600 watts x 2 @ 1 ohm stereo 1600 watts x 1 @ 1 ohms mono Dimensions: 3.5" (H) x 12" (W) x 24" (D)