This is the classic Technics SA-818. The SA-818 put out 110 watts per channel rms. It listed for $850.00 when introduced in 1980 and weighs just under 41 pounds. The SA-818 and it's younger brother the SA-616 only lasted one year as they were totally redesigned the following year.
One of the SA-818's features was called Synchro-bias which was a change in the circuitry to eliminate distortion from transistors switching on and off. It's rated maximum Total Harmonic Distortion is .005% or less. Not bad. It also had Quartz Synthesized Tuning and a new Class A amplifier section.
The SA-818 also featured LED meters instead of the older analog needle meters (Vu). Unfortunately non-functional meter LED's are a common problem with these units as they get older. In good working condition these receivers can sell for over $300.
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