provided by gisewhcs from the Hififorum

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

JBL GTS 300

1 × 124 watts, channel 1 at 4 Ohm
2 × 110 watts, channel 1 + 2 at 4 Ohm

1 × 317 watts, channel 1 + 2 bridged at 4 Ohm

317 watts total power