Okay, so I pick up my bass to practice on my already once repaired Ampeg BA115 combo and everytime I hit F# it sounds like the speaker is blown out. I obviously have to have this repaired AGAIN. But as soon it as it is done then I am done with it. Any suggestions on what I should replace it with? I don't play out and only get together with my buddies every once and while. I do want more volume though. This amp was made in China, and it is obvious to me that Ampeg has not kept a close eye on quality control.