provided by MuMpeL from the Hififorum

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

Spectron SP-M2100

1 × 62 watts, channel 1 at 4 Ohm
2 × 57 watts, channel 1 + 2 at 4 Ohm
Current consumption 13,9A
efficiency 60,8%

1 × 166 watts, channel 1 + 2 bridged at 4 Ohm
Current consumption 23,6A
efficiency 52,2%

166 watts total power