Heck yeah! I got a Super Champ XD for $50 because it had something "wrong" with it, which turned out be a bad 6V6. I popped in a pair of old GE 6L6 tubes I had laying around, and it's ran fine since then. I agree that the Fender models sound better with them instead of the 6V6's. I routinely run it around 6 on the volume and the speaker and amp seem to be doing fine.