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

Rockford Fosgate Punch 500.2

1 × 396 watts, channel 1 at 4 Ohm
2 × 396 watts, channel 1 + 2 at 4 Ohm with 13,4V supply voltage
Current consumption 82,4A
efficiency 71,7%

1 × 1282 watts, channel 1 + 2 bridged at 4 Ohm with 13,3V supply voltage
Current consumption 149A
efficiency 64,7%

1282 watts total power