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

Sony XM-3020S

1 × 41 watts, channel 1 at 4 Ohm
2 × 37 watts, channel 1 + 2 at 4 Ohm
Current consumption 8,5A
efficiency 63,8%

1 × 102 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 14,8A
efficiency 51,1%

102 watts total power