After asking what was wrong with the guitars, during the first two songs, I was told it was the (HOB)House Sound enigineer(onstage), he had plugged the guitars in the wrong channel. Testament's Sound Enigineer(Doug Hall), did not know until the band had started to play. And corrected the problem as soon as he figured out what the exact problem was. Not Doug's fault, but some miscommunication, & The House Of Blues staff was at fault.