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

Rockford Fosgate Punch P400-2

1 × 142 watts, channel 1 at 4 Ohm
2 × 136 watts, channel 1 + 2 at 4 Ohm
Current consumption 27,8A
efficiency 72,3%

1 × 449 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 51,1A
efficiency 65,2%

449 watts total power