Sure sounds like the electronics need checked out to me as well. Good luck with them and hope repairs are reasonable. Probably worth keeping!
The volume of my speakers going down by itself and going back again in a minute or two
I just upgraded a used Audio Research tube Preamp and a power amp. I found that the The volume of my speakers going down by itself and going back again in a minute or two. What could be wrong? Both amp and preamp are used. I had my speakers for 20 years. Never had the issue before. Help!