I tried some in my Mark III the other day and 2 out of the 3 I put in there are still in there. They sound great in the first three spots V1-V3. They are really crunchy, but reasonably warm and articulate. They didn't have quite as much low end as most other preamp tubes I tried, though. I still prefer the Penta C9 12AX7 for V3 (lead channel) spot. Cleans sound really nice, not too bassy and a little shimmer on top. Can't beat them for the price, I'd say.
No announcement yet.
The Sovtek 12AX7WC is a pretty neat tube.