So I've read a few posts here concerning unwanted "fizz" in a high gain channel, but still not sure what the main cause of this is, or what the best steps are to get rid of it.    With my Vetta, my "go-to" high gain setting had a lot of different effects in it, and had a lot of distortion, but not that "fizzy" sound. It sounds like something that a little tweaking might clear up, but no luck yet.    For example, when I play with the treadplate pre, I get fizz with the pre's gain set to about 6