In this video of an interview of Joe Bonamassa, the amp is a silverface Champ miked in a bathroom. Through most of the interview the amp is on V=10 (T about 8, B about 3.5), and the guitar volume is turned down. See the amp and its control settings at 5:41, and hear a couple of seconds of both the amp and the guitar turned up all the way (and there's some trash as expected). Then fast forward to hear some playing in various styles. I think it sounds great. My guess is that it has a cleaner than stock speaker installed. Does it sound like a stock SF Champ to you?