I purchased one of these amplifiers new in 1993 and used it very little. Recently I noticed that the sound coming from the right speaker is only about half the sound coming from the left. Does anyone know what I can do to repair this amp or should I just throw it away and purchase another. I know that it is not the speaker nor the speaker wire. It is definitely the amp.
check the push-pull final stage. the input to one stage is the output of the other, then your signal is taken off this transistor. If one transistor burns up then the output is one half or something compared to one half of a full wave rectifier.