hi, wow poa6600a dennons, what a blast from the past, they were one of the first pairs of monoblocks I ever owned, back in the early 90s and I was in my early twentys. seems like forever ago, I wish my hearing was as good now as it was then. oh well, how long have you had them ? the problem sounds like runaway bias, I think you can get that fixed. good luck, chrissain
