I could use a little help as well....currently I have a Peavey xxx, with sovtek 6l6wxts in the power, and ehx 12ax7s in the pre. the chain is ts9>decimator>xxx>mesa oversized 4x12 I got the amp used, and don't really know if the tubes are bad, not for me, or if the overall amp isn't for me. Basically the tone is just really thin...everything is super tight, (with a ts9), but it seems like all i get is attack for the most part. I was thinking of trying kt77s, but idk if just a diff brand of 6l6 will do the trick. Maybe new pre tubes? Any suggestions?