[quote name='discreet' timestamp='1419187017' post='2637399']
My view is that the whole 'cryogenically treated valves' thing is more snake oil.
Very little, if any audible difference between the two and certainly far less than choice of strings or pickups, for example.
[/quote]
This is pretty much what I thought the case would be.
[quote name='mickster' timestamp='1419185843' post='2637373']
So if you want longevity, I can recommend NoS, esp for power tubes. If you're interested in tonal differences between valves, you really need to try them for yourself and decide.
[/quote]
Brilliant advice, thanks. Looking on Watford now and it looks like they only have 1 NoS but it happens to be an EL84. Prices look good so I think I'll give those a try.
Pretty cool buying valves made in the 70s for the Russian Military....