Rated power measured according to DIN 45500 up to 1% distortion factor in 13,5V

Mac Audio Mac Attack 4051

1 × 66 watts, channel 1 at 4 Ohm
2 × 63 watts, channel 1 + 2 at 4 Ohm
4 × 56 watts, channel 1 up to 4 at 4 Ohm
Current consumption 26,8A
efficiency 61,4%

1 × 196 watts, channel 1 + 2 bridged at 4 Ohm
2 × 159 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 45A
efficiency 52,3%

318 watts total power