provided by booorsti from the Hififorum

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

Helix HXA 40X

1 × 75 watts, channel 1 at 4 Ohm
2 × 69 watts, channel 1 + 2 at 4 Ohm
4 × 58 watts, channel 1 up to 4 at 4 Ohm
Current consumption 28,6A
efficiency 59,8%

1 × 219 watts, channel 1 + 2 bridged at 4 Ohm
2 × 166 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 47,1A
efficiency 52,3%

332 watts total power