Rated power measured according to DIN 45500 up to 1% distortion factor in 13,5V
Impact HQ100.4
1 × 133 watts, channel 1              at 4 Ohm 
2 × 119 watts, channel 1  + 2       at 4 Ohm   
4 × 95 watts, channel 1  up to 4     at 4 Ohm   
Current consumption 48,8A
efficiency 57,7%
1 × 342 watts, channel 1  + 2 bridged at 4 Ohm
2 × 231 watts, channel 1  + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 77,3A 
efficiency 44,6%
462 watts total power