Kenwood Excelon X801-5 5-Channel Car Amplifier Class-a/b FullRange stable 5-channel amplifier RMS Power Rating: 4 ohms: 50 watts x 4 chan. / 2 ohms: 75 watts x 4 chan. / Bridged: 4 phms: 150 watts x 2 chan. Total power output: 1600 watts Pulse width modulated MOSFET power supply 3-Way protection circuitry (thermal, overload, and speaker short protection)