Natural Sound AM/FM Stereo Receiver
Features of the Yamaha R-9 include low impedance drive, high dynamic power, zero distortion rule amplification, continuously variable loudness control, computer servo lock tuning system and wireless remote control capability.
Tuning range: FM, MW
Power output: 125 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.015%
Damping factor: 60
Input sensitivity: 0.16mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 75dB (MC), 92dB (MM), 103dB (line)
Channel separation: 60dB (MM), 60dB (line)
Output: 150mV (line)
Speaker load impedance: 6Ω (minimum)
Dimensions: 435 x 151 x 423mm
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Reviewed Jan 14th, 2016 by RonGinsberg
I have owned this receiver since July 1986. It is a powerhouse; the 125 output is very conservative. Leonard Feldman reviewed it in one of the audio magazines of the day and agreed that it had wonderful specs and a very robust power supply. He loved it. It could and can deliver lots of clean power. And it is very durable since it was designed to take the heat of pure class A operation. I never use it in class A since it runs so hot in class A, and I can't hear the difference.
It has never failed me and I use it to this day as an extra amp through the equalizer loop by feeding the signal from my Yamaha AV 3040 for a second zone, I run three separate pairs of speakers through the R9 without any difficulty.
The FM section is stellar and flexible. It has bass, midrange, and treble controls, along with tone bypass. It has a switchable MM/MC phono input. All the specs are superb. And it is bullet proof. In 30 years it has not malfunctioned. It works as well today as the day I took it out of the box. They don't build them like this anymore. The only problem with it is that it will lose the FM station memory if you turn it off. It retains the memory as long as it is in standby. This is because it used capacitors for back-up. I have seen some articles about how to replace them, but I never bothered.