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

Phoenix Gold ZX500

1 × 193 watts, channel 1 at 4 Ohm 
2 × 172 watts, channel 1 + 2 at 4 Ohm 
Current consumption 40,2A
efficiency 63,2%

1 × 529 watts, channel 1 + 2 bridged at 4 Ohm at 13,4V
Current consumption 69,1A 
efficiency 56,7%

529 watts total power

Bridge mode measured up to the clipping limit