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

Sony XM-1502SX

1 × 215 watts, channel 1 at 4 Ohm
2 × 195 watts, channel 1 + 2 at 4 Ohm
Current consumption 45,6A
efficiency 63,2%

1 × 484 watts, channel 1 + 2 bridged at 4 Ohm with 13,4V supply voltage
Current consumption 68,4A
efficiency 52,8%

484 watts total power