Hi @rocray Not sure at this juncture, and its because of how these tubes sounded in the first 45 minutes and the next 6 hours brand new. I’m more use to the sound being kinda strange first 2-20 hours on new input tubes like this.
First, I’m wondering if these were pre-burned in 72hrs or something like that. I doubt it, but they almost sounded too good at 6hrs of run-in time last night. So much so, that I don’t want them to change any more, hoping they stay put as-is.
Trying not to pre-judge them yet, they are too new, will try to run them in some more evenings this week and a lot more next weekend. I’m comparing them to my NOS Sylvania 3-hole black plates, TJ Full Music 6SN7s, and generic TS re-issue 6SN7GTBs as a very wide baseline to compare to. To be fair, I’d need to buy a set of Linlai too, maybe later this year on those. Will do.