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

Ground Zero GZUA 4125SQ

1 × 146 watts, channel 1 at 4 Ohm
2 × 136 watts, channel 1 + 2 at 4 Ohm
4 × 132 watts, channel 1 up to 4 at 4 Ohm
Current consumption 55,1A
efficiency 71,1%

1 × 441 watts, channel 1 + 2 bridged at 4 Ohm
2 × 420 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 99,7A
efficiency 63,5%

840 watts total power

provided by frieder80 from the Hififorum

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

Ground Zero GZUA 4125SQ

1 × 145 watts, channel 1 at 4 Ohm
2 × 136 watts, channel 1 + 2 at 4 Ohm
4 × 131 watts, channel 1 up to 4 at 4 Ohm
Current consumption 54,9A
efficiency 70,8%

1 × 441 watts, channel 1 + 2 bridged at 4 Ohm
2 × 416 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 100,1A
efficiency 62,1%

832 watts total power