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

Sherwood XA-7800

1 × 123 Watts channel 1 at 4 Ohm
2 × 105 Watts channel 1 + 2 at 4 Ohm
4 × 98 Watts channel 1 up to 4 at 4 Ohm

1 × 306 Watts channel 1 + 2 bridged at 4 Ohm
2 × 272 Watts channel 1 + 2 and 3 + 4 bridged at 4 Ohm

544 watts total power