provided by gisewhcs from the Hififorum

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

Heritage AP-200

1 × 30 watts, channel 1 at 4 Ohm
2 × 27 watts, channel 1 + 2 at 4 Ohm
Current consumption 6,6A
efficiency 60,7%

1 × 81 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 10,8A
efficiency 55,6%

81 watts total power