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Primaluna Prologue One power tube rolling

I've tried some EH 6CA7s as well as the stock tubes and JJs. I was curious about trying KT77s since they're another EL34 variant ... and then I got to thinking, what about KT88s.

It has adaptive auto bias so I figured it should work just like the Prologue two, correct? I konw the extra cost of the 2 buys you the upgraded caps, diodes, and KT88s ... but does that mean you CAN'T use KT88s with the 1??
gnugear

Showing 1 response by rar1

rar1's avatar
rar1
1,811 posts
 
I have the Prima Luna 2 integrated and Prima Luna 5 power amps. When I upgraded preamp tubes, Kevin Deal (Upscale owners) suggested NOS 12AU7 Sylvanias and 12AX7 Mullards. Excellent upgrade.

As for the power tubes, it is recommended to only use the EL-34 with the P1 (look at Upscale Audio's web-site). The P2 supports tube rolling.

Regards, Rich
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