What phono preamp are you using?

Klyne 7PX3.5 and Pass Xono Se, flanked by several passive and active step ups to connect different cartridges; Audioquest AQ7000, Nakamichi Mc1000, Ortofon 3000MK2 and Rhomann cartridges, Sato Musen Zen diamond, some Denon, Grado Signature (MM) and others but I don’t have any Sondsmith cartridges.

@bkeske

I would agree it sounds surprisingly good with the wall wart and if you're stock tubes are working well, probably leave those alone too.  Mine no matter what order I placed the 4x 12ax7 tubes, I had a balance issue so I ordered up matched gold lions and this sorted it right out.  The lions are really starting to shape up.  I will have an opportunity to AB against my friends with stock tubes April 24. We both use the SBooster supply, thus in theory any noticeable difference will likely be in the tubes assuming we have similar break-in and ignoring any production variance (not a likely contributor).  

Probably can't go wrong with any of them--i have the Herron purchased last year and Keith gave me a deal--call him

Experion.  Conrad Johnson TEA1 series 3.  Three options for SUT:  1.  The one built into the TEA1, 2. Bob's Devices Sky 10, 3. Consolidated Silver wire.