I've had a Super champ for awhile now, basically since they came out. I really enjoy the amp alot, great tone and versatility. I do have one issue with it, but I haven't seen anybody else mention it, so I'm wondering if it's just mine...Like I said, great tone, most of the time. The exception is when playing a humbucker equipped guitar. At those times I get a lot of compression from the amp, so the notes seemingly 'pop' out of the speaker. It's most noticable in the 'Tweed' and 'Blackface' voicings, least noticable in the high gain voicings. The hotter the humbucker, the worse the compression. Single coils sound great, P-90's sound great. So, if anyone else has heard of, or is experiencing the same thing, let me know, especially if you have a fix for it. Other then using only single coil pickups.....

Love this amp, but it has a rattling "light bulb" sound when certain notes are held, very annoying. I guess it is the power tube as I did switch out the 12ax7.

Anyone else have this sound?

Ive got the super champ xd and like Jim i got a bit of a rattling problem. I havent changed out the tubes yet to see if thats the problem, but perhaps will in the near future.