provided by gisewhcs from the Hififorum

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

Precision Power PPI-2150AM

1 × 178 watts, channel 1 at 4 Ohm
2 × 178 watts, channel 1 + 2 at 4 Ohm
Current consumption 52,7A
efficiency 50,1%

1 × 645 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 102,4A
efficiency 46,7%

645 watts total power