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

Audio System Twister F4-400

Section A
1 × 155 watts, channel 1 at 4 Ohm
2 × 143 watts, channel 1 + 2 at 4 Ohm
Current consumption 30,3A
efficiency 69,8%

1 × 445 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 52,7A
efficiency 62,6%

Section B
1 × 63 watts, channel 1 at 4 Ohm
2 × 60 watts, channel 1 + 2 at 4 Ohm
Current consumption 12,8A
efficiency 69,5%

1 × 185 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 22,8A
efficiency 60,1%

630 watts total power