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

RTO Rock-445

1 × 52 watts, channel 1 at 4 Ohm
2 × 49 watts, channel 1 + 2 at 4 Ohm
4 × 42 watts, channel 1 up to 4 at 4 Ohm
Current consumption 21,8A
efficiency 57,4%

1 × 142 watts, channel 1 + 2 bridged at 4 Ohm
2 × 106 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 34A
efficiency 46,2%

212 watts total power