Anyone running a tube preamp with a Pass XA25?


I've got a Pass XA25 and an XP12, great combo, no issues. Having said that, I'm curious how a tube pre might play with an XA25? Anyone running a combo? Thoughts? Impressions? No need for balanced out, a line stage is what I need. Thanks all!
geof3
Went through the same scenario, looking for a preamp for my XA25. I have a older model Supratek Sauvignon and a LTA MZ2. For my ears the LTA won hands down. I still have the Supratek and will experiment with some different tubes.
I used a CJ ET5 and am now using a CJ ET7S2 with my XA25. The two mate very well. I also think you want the most neutral preamp you can find.  
@cellorover

i am curious to have you describe the sonic difference between the cj et5 and the newer et7-2 you have experienced...

i currently have the et-5 (and an older prem 16 ls2 too), i had a gat for almost a year a while back, but i felt it was a little too edgy/forward for my taste, after much tube rolling to tone it down a touch - for me the et5 lives at a very good middle ground between the old cj honey colored soft bass/treble sound to the thoroughly modern ’details in your face’ sound...

also, if you don’t mind, pls tell us the rest of your system (i checked your ’details’ did not see a system listed)

@geof3 - apologies for the minor threadjack ...