When I play my guitar with my Boss GT-10 effects processor through my B-52 AT-100 all tube half stack amplifer I get some serious speaker crackling, but ONLY when I'm playing on my patch that features super high gain, and it only seems to happen on higher notes. Like a C# power chord with the root on the B-string. Could this be a bad speaker, or do you think I have the GT-10 set up wrong?