I purchased my second AX2 212, used, as a backup to my original amp which I purchased new. I still love these amps. Here is my problem:
On the used amp, I get a buzzing sound on lower pitched notes, which sounds like a blown speaker. I replaced the speakers with the recommended Eminence GB128 speakers, and the buzzing continued, so I guess the problem isn't the speakers. Has anyone else had this problem, and what might be a solution?