Primaluna’s stock tubes in the outer positions are fine. I have been running vintage Amperex "Bugle Boys" in the gain positions with great results. On the power amp I run A-matched EL-34's from Sophia Electric - also outstanding.
Primaluna signal tube replacement
I need to replace my small signal tubes in my 2 year old Dialogue Premium. The 2 middle tubes are good. I had replaced those with GL 12au7. The outer tubes are stock Primaluna. Left channel got “scratchy” and I replaced with some backups.
Do I go cheap? Doesn’t affect audio quality,,right? Or pay more for longevity? Love the amp and it’s on a lot. Thanks for your advice.