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

Mac Audio Fearless 4000

1 × 139 watts, channel 1 at 4 Ohm
2 × 131 watts, channel 1 + 2 at 4 Ohm
4 × 119 watts, channel 1 up to 4 at 4 Ohm
Current consumption 55,2A
efficiency 63,8%

1 × 380 watts, channel 1 + 2 bridged at 4 Ohm
2 × 324 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 89,8A
efficiency 53,9%

648 watts total power