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Primaluna - Rolling pre tubes question...


I'm new to rolling tubes, and have been using the stock 12AU7.
I've a PL Prologue premium integrated with 2 12AU7's per channel. I want to test a new pair(before investing in more), so wondering if front or rear position would best reveal the new tubes character?

Thanks,
Darren
128x128dmhenley
mechans
3,048 posts
 
I think that Kevin Deal/Upscale would be the first place I would buy upgraded 12AU7s from, since they should know their own amps. You might just call them and ask where the tubes do the most good.
newbee
4,767 posts
 
The two center positions will reveal a greater difference than the outer two. But, I suggest that power tube selection will have a far greater influence in the sound quality. If you haven't already done so, start there and then fine tune with the small tubes.
saki70
907 posts
 
+1 for what Newbee said .
If you received your amp with the stock power tubes , they are decent . They should be Shuguang EL-34's with reddish brown bases . You'll get as many different suggestions as replies for powertubes to try .
What do you wish to gain or change with your tube rolling ?

Happy Tunes
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