Tubes for Jolida Fusion Preamp

I owned that preamp and it was fun to roll tubes in it.
First decide what type of timbre you are looking for in your system. NOS tubes will sound better than new production tubes, but they are priced higher according to availability.

RCA Blackplates have a very open classic tube sound. I also liked Amperex (Holland) which produce an extremely wide and deep 3D image; however, they will reveal the flaws in a poorly mastered CD.

TCTUBES is a great company, but also check out the Brent Jessee website. It has lots of info on tube types and their particular sonic signatures; plus he has a large inventory of tubes.

There are so many possibilities when using NOS tubes. I think you are mistaking me for another member. But I have been using various tube CDPs and preamps.

Wolf is correct and not paranoid... the dealer must have a return policy.
NOS can mean New Old Stock or it can also mean the tube was used in a
medical or military component in the 1950s for a short time and then was
put on the market for sale as new. The dealer would be unaware and test
the tube and it may still test as new.