Best 845 amp?

I had forgotten the earlier 845 thread. To update the bit about the 845C and 845M tubes sold by Super TNT and produced by Shuguang, both of these tubes are currently available, both are "metal plate" tubes, and SuperTNT confused the issue by introducing a new version of the "M" without changing their model designation! The original "C" and "M" tubes were essentially the same. Confused? Join the club. The good thing is that both the current "C" and "M" tubes are excellent. I just bought a pair of new-production 845Cs from Sophia Electric and like them a lot, though they are the brightest (visually) tubes I ever saw. Dave

Tmhaudio, re the 845C question, I don't know. Sophia claims theirs is new production. SuperTNT, having stopped selling the original "C" under their own name and discouraging people from buying it, may well be selling from old stock. I had a pair of the "original" C version and did not like it as well as the "B" in my amps. But this new one from Sophia is much better. To me it's certainly worth the difference in price, which shrinks a lot if you factor in the cost of getting it shipped from China (from SuperTNT).

I'm not technically knowledgable enough to be able to help, sorry. I do know that my amp designer/builder had to alter the bias substantially (up or down? don't know) to accommodate the 845Cs after my using 845Bs. This despite the fact that Sophia said no bias change would be necessary.

Regarding dynamics, my sense is that these particular 845Cs are quite a bit more dynamic than the Bs. Whether they're more dynamic than the original Cs, I'm not sure but I think so. Dave