https://tmraudio.com/components/preamplifiers/modwright-analog-bridge-tube-buffer/
@jbuhl Yep - the "Analog Bridge" by ModWright is a fantastic suggestion for OP that shouldn't get buried. And Dan Wright is truly a great guy. I almost picked up one myself, but I'm such a gear hoarder and already have so many tube components - I'm not sure I have a use case for it yet. Seems perfect for OP to try.
A lot of tube preamps use something like an Alps RK27 pot (aka "Blue Velvet", or its motorized version), which always audibly penalizes sound quality (even if slightly) whenever I've compared it to other alternatives. Even up to very high MSRP's, you see that ubiquitous blue plastic pot all too often. I hate it! I absolutely hate the Alps Blue. I can't understate that. In general, the volume control is often a weak point of the tube preamp. The Bridge avoids that issue.
I was running a Rogue RP-7 tube preamp into a highly-regarded Rogue tube power amp, the power amp replacing a SS amp driving my Fyne Audio F-702 speakers that were made in Scotland. I felt it resulted in degraded tonal qualities of instruments, reduced definition, and slightly reduced soundstage. I replaced the tube power amp—but kept the tube preamp—with a pair of Odyssey SS monobloc amps, and I have regained what I lost plus gained better imaging and depth and lateral dispersion of soundstage.
@mike4597 Most of the Rogue power amps (I had Apollo Darks) do not sound like traditional tubes. And the RP-9 didn't sound even *slightly* like a tube preamp to me (like the RP-7, it's actually a hybrid). I've had Solid State amps that are actually "sweeter" sounding. Glad you found what works in your system! Nice speakers.