Adcom GFA-565se User Manual page 19

Power Rating (To FTC Requirements)
250 watts continuous average power into 8 ohms at any frequency between 20Hz and
20kHz with both channels driven at less than 0.04% THD.
350 watts continuous average power into 4 ohms at any frequency between 20Hz and
20kHz with both channels driven at less than 0.05% THD.·
700 watts continuous average power into 8 ohms at any frequency between 20Hz and
20kHz at less than 0.1% THD, bridged.·
IM Distortion (SMPTE)
1 watt to 250 watts into 8 ohms
1 watt to 350 watts into 4 ohms
IM Distortion (CCIF, Any Combination from 4kHz to 20kHz)
250 watts into 8 ohms
350 watts into 4 ohms
THD + Noise at 250 Watts into 8 Ohms
20Hz
1kHz
10kHz
20kHz
THD + Noise at 350 Watts into 4 Ohms
20Hz
1kHz
10kHz
20kHz
IM Distortion, Bridged (SMPTE)
GFA-565 SPECIFICATIONS
≦0.009%
≦0.009%
≦0.002%
≦0.003%
0.008%
0.004%
0.006%
0.010%
0.009%
0.004%
0.015%
0.025%