Have been having problem with left front speaker working. I apply pressure on the back of the amp and the speaker works temporarily. I took the amp cover off and tightened screws. Now both front speakers are not working. The middle and rear speakers work in the front speaker plug ins. It’s part of a 20 year old component system. What could be the cause ?
Pioneer M-4000 amp
- Thread starter 3040kraig
- Start date
