NEW MB QUART ONX4.125 1000W 4 Channel Car Amplifier Amp ONYX Series 4-Channel Class A/B Car Amplifier Peak Power Handling: 2000 Watts; Variable Bass Boost (0 to +12 dB bass boost at 45 Hz; 4-Way System Protection circuitry (DC, thermal, overload, and speaker short protection) 4-gauge power and ground wiring is required for installation RMS Power Rating:4 ohms: 125 watts x 4 chan.; 2 ohms: 250 watts x 4 chan.; Bridged, 4 ohms: 500 watts x 2 chan.