From the golden age of HiFi another Rotel goodie. Sounds great. This one was noisy due to a small signal transistor gone faulty, it was microphonic so quite easy to find, i.e. just tap it and you can hear it through the speakers! and a few other problem ones also changed. Some of this era's semiconductors are known for problems after 40 plus years. Cleaned up well and now sounds like it should; these are a really nice vintage amplifier and well worth fixing.