What tube pre-amps pair well with Pass amps?


Does anyone have experience with this?  I'm running Focal Sopra No. 2s and I understand the Focal's pair nicely with Pass amps.  Any tube pre-amps you'd recommend for consideration? I like the classical rock, but am gravitating more to jazz, classical and vocals. I just want to try something new.  Thanks.
billtro
Billtro

What’s the budget? New or used? 

I use use a PS Audio’s BHK Signature preamp with a pair of Telefunken 12au7’s from the early 1960’s into a Pass Labs xa30.8 class a stereo amp and it sounds amazing. Hope this helps.

Scot
Check out the KR P-135.  Has XLR ins and outs.  Review at positive feedback is glowing.  
Full disclosure I am a KR dealer but I think it would be a cool match.  
Scothurwitz

Thanks for the reply.  I'm currently running Prima Luna Dialogue pre-amp and 2 HP amps as mono blocks, which I intend to keep (read tube rolling fun) in a 430 square foot room.  The PS audio pre-amp has been on the screen, as I have their DMP and DAC.  With this matchup, do you think the Pass Labs XA 30.8 has sufficient power for the Sopra 2's?  I've always been intrigued by Class A amps and its on my bucket list. 

One last thing, do class A's handle sub-woofers?