[quote name='dood' post='304566' date='Oct 11 2008, 08:51 PM']What did you buy in the end? I have upgraded both a black face SVP-Pro and a grey hammerite face Ampeg SVP-Pro with valves from Watford Valves and the difference was almost shocking to hear that such poo stock valves are shipped in th epreamps. Sorry Ampeg, just my experience.
Both times I order HARMA Diamond STR drive tested selected ECC83/12ax7's and a personal fave, the Jan-Phillips ECC82/12AU7 (cant remember the model number I am afraid, but Derek Rocco also suggests using them).
You will be very happy with the results.[/quote]
yep...i took derek's advice as well (the phillips is a 5814a btw)
the valves it came with were sovtek 12ax7's and a single groove tube 12au7...not sure if they were the stock ones or not.
it's a massive difference in tone. i also can't get over how much louder the pre is as well.
hat's of to watford valves. huzzah !