Not really digging the clean tones on the RV100. Really bassy and round, kinda just "flat" sounding. Sounds better than when I first got it, though. At first it broke up really easy, around 12 o'clock in volume I was getting into almost mid-gain territory. Exchanged the stock no-brand "Ecc83" in V1 for a silver series Groove Tube 12ax7 and had much more clean headroom. Now I switched the 12ax7 to V2, and put Groove Tubes Ecc83 in V1 and V3. The rest are the generic ecc83's and 12at7's. Power tubes are the stock EH 6ca7's. The OD is beautiful, but I know I can be pulling better tones from this amp. I'm thinking it may be the ecc83's. I was also thinking about trying some SED 6L6's and having it biased (remember, this amp will work with EL34, 6CA7, 6L6, KT88, or 6550 tubes). It could be running pretty cold for all I know, it's still pretty much the factory setup. All input would be greatly appreciated. Thanks, guys.