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

Sony XM-7547

Hi-Voltage Mode
1 × 100 watts, channel 1 at 4 Ohm
2 × 100 watts, channel 1 + 2 at 4 Ohm
4 × 100 watts, channel 1 up to 4 at 4 Ohm
Current consumption 47,4A
efficiency 62,5%

1 × 313 watts, channel 1 + 2 bridged at 4 Ohm
2 × 310 watts, channel 1 + 2 and 3 + 4 bridged at 4 Ohm
Current consumption 84,1A
efficiency 54,6%

620 watts total power

Hi-Current Mode
1 × 97 watts, channel 1 at 2 Ohm
2 × 97 watts, channel 1 + 2 at 2 Ohm
4 × 97 watts, channel 1 up to 4 at 2 Ohm
Current consumption 65,9A
efficiency 43,4%

1 × 375 watts, channel 1 + 2 bridged at 2 Ohm
2 × 370 watts, channel 1 + 2 and 3 + 4 bridged at 2 Ohm with 13,4V supply voltage
Current consumption 130A
efficiency 42,2%

740 watts total power