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

Branson Krass X1500

1 × 484 watts, channel 1 at 4 Ohm
Current consumption 43,5A
efficiency 82,4%

1 × 820 watts, channel 1 at 2 Ohm
Current consumption 80,3A
efficiency 75,7%

1 × 1086 watts, channel 1 at 1,33 Ohm
Current consumption 112A
efficiency 71,8%

measured with 200 Hz because of fixed preset low-pass filter