Looking for info/impressions on Tung Sol 5998 burn in...
Just threw in some NOS 5998's and I'm finding they go extremely deep and sound very powerful, but the highs sound rather "shaky" - almost a static/sibilant feeling to them. It reminds me of clipping, but I'm certain that my DAC and levels are all good.
Hoping that the highs will tame in the next 20-40 hours... anyone have experience with this as well?
I also bought another pair and one of them hums slightly; it's audible between songs on headphones, but masked with speakers as they aren't quite as revealing. Bummer. Guess I'll leave them for my speakers, although I actually prefer 6AS7G's with my speaker setup as I think they gel better.