In article , tony sayer
writes:

Eat yer heart out Ross theres a new audio magicke bandwagon doing the
rounds;!

https://www.musicstore.de/en_GB/GBP/...us-Valves/cat-
GITARRE-GITROEDIV

Severely overpriced compared to Watford Valves.

I have no desire for valves in either hi-fi equipment or instrument
amplifiers, so I don't have any personal experience of whether there
might be a difference between valves, but this might be of interest
(it's from the POV of intrument amp users, not hi-fi):

http://forum.cakewalk.com/12AX7-tube...-m2096810.aspx

--
Mike Fleming