Yesterday I bought a Vox AC30CC2 from GC. I've read lots of good reviews lately and decided it would be a good replacement for that POS Marshall JCM 800 4212 (Now I know why people bash on channel switching JCM 800's). Anyway, it has an amazing clean tone but a really buzzy/fizzy overdrive. And I'm finding it really hard to dial in a good overdriven sound. Is this just how AC30's are, or did I get a lemon? Any info is appreciated.