First of all, if the tubes are in your amp, they aren't NOS. If they've ever been in an amp or, frankly, out of the original branded boxes, they aren't NOS. The term "NOS" has become so diluted these days when discussing vacuum tubes, and honestly that's one major reason I've shifted towards new power tubes in my primary gigging amps. At least with the popular power tube types, tube resellers are scraping the bottom of the barrel when it comes to stock, and for me, new Tung Sols or Electro-Harmonix 6V6 sound just as good and are more consistent. I have a pair of EH 6v6s that are 11 years old and still test and sound great. Am I saying they'll have the longevity of some RCA Blackplates? Certainly not, but I do feel there's a fair bit of mythology around the ideas that NOS tubes are indestructible and conversely, that new production tubes are crap that need to be thrown away every year "just to be safe" whether they sound good or not.
I just meant my pre amp tubes were NOS when I purchased them/installed them.. they are certainly no longer new
I’ve got nothing against the new tubes and have certainly used them in amps.. just wondered if I was missing anything in not trying NOS 6V6.
I’ve heard one local amp tech say that power tube brands make no difference in sound and another local tech say the complete opposite… haha