New Dual XPR540 1200 Watt 4/3/2 Channel Class A/B Car Audio Power Amplifier Amp New Dual XPR540 1200 Watt 4-Channel Class A/B Car Audio Power Amplifier Amp Number of Channels: 4/3/2 Power Output (4 O): 150 Watts x 4 Power Output (2 O): 300 Watts x 4 Power Bridged (4 O): 600 Watts x 2