I recently discovered that I can make an absolutely nasty, fat, grinding distortion by using the neck humbucker on my ASAT Classic Bluesboy, tone all the way down, going through my Boss SD-1 super overdrive with level, drive, and tone turned all the way up into the high gain output on my Fender Champ 600. I'm sure this is doing terrible things to the speaker, but frankly it kind of deserves it.