3D, that’s cool, I have been Trecky forever but all my PL stuff is series 2.
Got it! Found a place where you could see them
side by side. The 4000 S2 is a very attractive piece!
Myself, I have my original 2000 (Series I) preamp, which I will restore/make as quiet as possible. Along the way, I also picked up a clean, affordable, used 3000 preamp, and no doubt this will be the first one I will practice my preamp hotrodding chops on. (My plan is for the 3000 S2 & 400S2 to use in the shop -- whereas the 2000 & twin D500s will be in my main system.
(But I'll be spending most of my time in the shop between now & the forseeable future? Huh? :0)