Tube Preamp with Solid State Amp?

Mildly OT:  does anyone know what brand 12AU7s VTL uses in the 6.5 II preamp?  Much thanks.

Preamps are Primaluna Dialogue and Mac C33.  Amps are First Watt SIT-3 and Cary SLA70 (EL34s).   Speakers are Klipsch Belle with new Bob Crites crossovers/tweeters and Zu Omen Dirty Weekends.  The ss-tube, tube-ss, tube-tube and ss-ss combinations are a lot of fun to explore with various genres and sources of music.   My favorite is live jazz (e.g. Jazz at the Pawnshop) with the PrimaLuna, First Watt and Belles.  Also have an SVS sub when I want to raise the roof.

BigJohn 9095-
I currently have a MicroZOTL mz2 mated with a Pass Labs XA-25 and couldn't be happier! The mz2 uses 12AT7/6201 input, 6SN7 or 12SN7 output. There are several reviews on the MicroZOTL, Herb Reichert, Teajay and the guy from New Record Day.. can't think of his name.
I had tried a Supratek Sauvignon and an Audio Research LS-3 and this little sucker blew both of those preamps out of the water. Nice air and transparency with good articulate bass. I purchased refurbished one with a remote for $1725.00 from LTA. If you have efficient speakers, its 1 watt is kind of fun to listen to.

Have fun!

Wow, there’s definitely a ton of good suggestions here. Perhaps an all Tube set up would be a good idea because my Parasound Amp drives those Cornwalls to insane levels with barely a turn of the Volume knob. However I tend to listen at mid to high levels as I listen to a lot of live music and this current system really can make me feel that live experience.

I have a small and challenging room set up where my Stereo is in one small section of my downstairs family room With no real options to move things around. So having that extra oompf from the A21 seems to deal nicely with any effects from my listening area.

Primaluna was my initial thoughts but I’m intrigued by the Raven Audio gear as well now after reading a bit more into them. Ahhh what to do, what to do lol