I have a peavey classic 50 4x10 and i have been trying to get a good clean distortion sound out of it. ive heard that turning the pre and post up, while turning the volume down is a good way. I was debating possibly getting a booster pedal as well. I currently have a Boss OD-20 and hate using it with my amp. it makes my amp sound ungodly loud and muddy. suggestions?

not that it makes any difference really,
but the music i play is mostly progressive and experimental stuff, so im not looking for a super hi-gain sound.
that would probably have the exact opposite effect of what i want....

and pre and post are two completely different settings on it