Not a big fan, myself been into upgrades for years, if you look in Tas magazine
his $4600 preamp maybe heavy but in a critical part of the circuit the output
just look left upper corner a cheap $25 alps volume pot that Silver round can , when in fact it should have a dedicated resistive ladder attenuators, or relays , just a plastic resistive carbon pot for volume you loose a fair amount of low level detail. Even the transformers. C core transformers ,and chokes go with tubes and for sure the best, look at anything in Japan or top elsewhere ,a toroidal transformer is fine for Solid State ,
it doesnot belong with tubes, having owned a Audiostore, and knowing upgrades
prima luna ,No Thank you !