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

Alpine MRV-F405

1 × 86 Watts channel 1 at 4 Ohm
2 × 84 Watts channel 1 + 2 at 4 Ohm
4 × 77 Watts channel 1 up to 4 at 4 Ohm

1 × 253 Watts channel 1 + 2 bridged at 4 Ohm
2 × 196 Watts channel 1 + 2 and 3 + 4 bridged at 4 Ohm

392 watts total power