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

Rockford Fosgate Punch 40ix DSM

1 × 57 watts, channel 1 at 4 Ohm
2 × 54 watts, channel 1 + 2 at 4 Ohm
Current consumption 11,5A
efficiency 69,6%

1 × 172 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 20,4A
efficiency 62,3%

172 watts total power