I have a b-52 at-112. I bought it used from a guy i met at college about a month ago. Within the past few days, after about 10-15 minutes of playing, it will pop and then begin to loudly buzz, and the volume of the guitar gets significantly lower. Don't really know much about amp repairs, what is going on here?


oh yea, the kid I bought it from said he changed the tubes in january, if that helps at all
this is really hard to diagnose over the internet so i suggest you take it in honestly.

i am assuming it is not cables, pedals, guitar, bad power, cell phones, computers, etc

could be a bad preamp tube?

could need all new tubes or a good once over by a tech as mentioned.