My personal favorite hand-wired tube powered bass amps.
My SVT-VR is awesome, but this is some next level shit.
MATAMP - GT200
VERELLEN - Meatsmoke
DUNWHICH AMPS - The Annunaki
REEVES - Custom 400
While I like them all, if I had to choose one, I’d probably go with the MATAMP. Either that or the Meatsmoke or the Annunaki which would be ideal for the Doom side of my tastes. The Reeves is incredible, but the 400 is too much wattage for my applications, at least for the foreseeable future. The custom 225 is worth a mention being the younger brother of the 400.
That being said the advantage of the SVT-VR is the 2ohm output load, and it will stay clean most of the way up the dial. I could image it powering a Berg 610 for a monstrous clean tone while the Matamp powers a Berg 412 for a ozone depleating dirty tone. Tone boners all over the place.