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

Alpine MRV-F505

1 × 100 watts, channel 1 at 4 Ohm
2 × 100 watts, channel 1 + 2 at 4 Ohm
4 × 100 watts, channel 1 up to 4 at 4 Ohm
Current consumption 45A
efficiency 65,8%

1 × 299 watts, channel 1 + 2 bridged at 4 Ohm
2 × 296 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 77,5A
efficiency 57%

592 watts total power