provided by Fabian aus dem Epicenter-Forum

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

ESX Signum SX-4120

1 × 127 watts, channel 1 at 4 Ohm
2 × 119 watts, channel 1 + 2 at 4 Ohm
4 × 105 watts, channel 1 up to 4 at 4 Ohm
Current consumption 50,3A
efficiency 61,9%

1 × 392 watts, channel 1 + 2 bridged at 4 Ohm
2 × 320 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 88A
efficiency 54,3%

640 watts total power