Hello iSanchez,
"I really don't know what or why it is, but in my system the Promitheus C-core TVC sounds amazing...."
I think I know why: a) you are not deaf and b) you do not buy "Recommended Component" and c) the monoblocks take care of a few weaknesses of this unit - 1 its flat a bit as all passive units but your monoblock create this "palpability" or "holographic imaging" and 2 Spectron more then enough compensate for weak bass of ALL passive units
So, you have all advantages of this TVC-gorgeous finish - box and none of its disadvantages.
I neaver audition active Placette and thus I can't comment - except I never audition solid state preamp I liked in my life.
All The Best
Rafael