If I had your integrated I probably would be tempted to try the kt150s just based on all the favorable reviews. They will not work in my El34 amp. I have used old stock mullards and a few new production tubes. But the best has been the Gold Lion kt77s I purchased from Upscale Audio.
EL34 tubes- alternates to matched octet for Primaluna HP dialogue premium
I have the Primaluna Dialogue Premium HP power amp that uses 8 EL34 tubes. I am currently using the stock EL34s, but have noticed a nice improvement in imaging when I switched to NOS mullards 12au7s.
As I look at playing around with different power tubes, (especially NOS Varieties) I see numerous sets of matched quads out there, but never matched octets, unless they are new production.
my question is this: what do I lose sonically by using unmatched tubes, or two sets of matched quads, or four sets of matched pairs? Wondering if since the Primaluna is self biasing, if it is less sensitive to non-matched tubes than other amps?
As I look at playing around with different power tubes, (especially NOS Varieties) I see numerous sets of matched quads out there, but never matched octets, unless they are new production.
my question is this: what do I lose sonically by using unmatched tubes, or two sets of matched quads, or four sets of matched pairs? Wondering if since the Primaluna is self biasing, if it is less sensitive to non-matched tubes than other amps?