I'm having endless issues with grainy overdrive sounds. Like most people I liked my tone til I put my ear up to my amp and figured out why it sounds terrible during performances. The constant is my guitar-- a semi hollow PRS.. should be a pretty much guitar in theory and it certainly is with clean tones. Not so much with overdrive. My main OD is the bb preamp which gets a lot of praise for it's natural and smooth character, although I've tried many others and the graininess persists. My current amp is a fender blues deluxe, although I've tried many many amps and they all respond the same. I use compression as well and it doesn't appear to tame it, I've tried to dial it out with amp EQ and pedal EQ.. no go. Whatever I do, my live sound is grainy with overdrive on. Could it be my amps pickups? Is this just the plight of humbuckers? Is it fender amps? Help me out people!!