hi there, the achromat is 5mm thick. the reason i used it on the heavy kit instead of just the bare platter is because i didnt want to chance scratching my records. it doesnt make much a difference with sound with it either on nor off, as the heavy kit is very "dead" anyway.
the lp12 i've just bought came with an achromat anyway (again 5mm), and i did use on on my old lp12 and it took all the ringing out of the platter, made the background more "black" and let more detail through. worthwhile investment definately on the lp12.
cheers, Al
nas spacedeck/heavy kit/funk achromat/ao pu7/hadcock gh228 super/audio note io/heed orbit. audio synthesis dsm 2 box dac/power supply/meridian 200 transport/monarchy d.i.p. tube technology prophet signature pre/power supply. tube technology m.a.c. signature phono preamp. tube technology genesis signature monoblocks. E.A.R mc3 step up. E.A.R 834p signature phono preamp. stax SRS 2020 headspeakers. audio physic tempo jubilee. lp12/ittok/achromat/dl304