It will be interesting to measurement old power amp Pioneer M-90, just to compare with new modern amp. SN ratio 125 dB.
Output power
(20Hz - 20kHz, both channel) 200W+200W (4ohm)
200W+200W (8ohm)
THD (20Hz - 20kHz) 0.003% (at the time of 8 ohm and an Output power)
Cross modulation distortion (50Hz:7kHz=4:1) 0.002% (20Hz - 20kHz, 200W, 8ohm)
SN ratio 125dB (IHF, a short circuit and A network)
Output power
(20Hz - 20kHz, both channel) 200W+200W (4ohm)
200W+200W (8ohm)
THD (20Hz - 20kHz) 0.003% (at the time of 8 ohm and an Output power)
Cross modulation distortion (50Hz:7kHz=4:1) 0.002% (20Hz - 20kHz, 200W, 8ohm)
SN ratio 125dB (IHF, a short circuit and A network)