Phono preamp tube rolling.

What components are in your system, any tubes? Which cartridge and TT?

Are you familiar with Joe’s Tube Lore? If not, check it out.


https://www.audioasylum.com/audio/faq/joes-tubes.html

OK then. Phono preamp is an extension of cart, arm, table. I'm sure you will be asked this question again.

In general, I am not a fan of tube rolling.  Listener bias makes it almost certain that you will be certain you hear differences right away.  (Because you spent money on the new tubes.) But those impressions tend to fade over time, unless you are replacing truly worn out tubes, in which case you will inevitably love any fresh tubes. Given the fact you have supplied no further information, that is about the extent of any response I can conjure.