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

Helix B4 Precision

1 × 81 watts, channel 1 at 4 Ohm
2 × 77 watts, channel 1 + 2 at 4 Ohm
4 × 71 watts, channel 1 up to 4 at 4 Ohm
Current consumption 30,4A
efficiency 69,6%

1 × 259 watts, channel 1 + 2 bridged at 4 Ohm
2 × 219 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 52,6A
efficiency 62,2%

438 watts total power