website "manualslib" list the specs for your amp as
Specifications
RMB-1565
Continuous Power Output 100 watts/channel
(20-20 kHz, < 0.03%, 8 ohms)
Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03%
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03%
Frequency Response ( ?1dB) 10Hz -...