provided by TimTaler from the Hififorum

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

Volcano VA 90

1 × 42 watts, channel 1 at 4 Ohm
2 × 42 watts, channel 1 + 2 at 4 Ohm
Current consumption 10,5A
efficiency 59,6%

1 × 132 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 18,3A
efficiency 53,5%

132 watts total power