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

US Amps Xterminator 50X

1 × 71 watts, channel 1 at 4 Ohm
2 × 64 watts, channel 1 + 2 at 4 Ohm
Current consumption 14,4A
efficiency 65,8%

1 × 196 watts, channel 1 + 2 bridged at 4 Ohm with 13,3V supply voltage
Current consumption 25,4A
efficiency 57,2%

196 watts total power