Turntable isolation

mostly mixing different passive isolation devices is not the best idea. think of adding an additional suspension below your current automobile suspension. the result would be unpredictable. therefore it’s likely that the best result is to not add anything between your Alto-Extremo LSP-2 footers and the solid top shelf.

if you are looking for alternatives to the Alto-Extremo LSP-2 footers, then that is a different conversation altogether.

you have already told us that you have a slab floor and solid heavy wood rack with a solid thick top shelf. so that top shelf should have sufficient mass and solidity to be a good base for those footers and the 150 pound mass of your turntable.

at best you could experiment with adding some sort of sold shelf layer like 1/2" steel or maybe panzerholtz (Taiko Daiza) just to add mass. but it might overdamp your sound.

my guess is it’s most likely you are good to go as you are now. if you share which turntable you are buying that might raise other comments.

btw; a big congrats on getting a new 150 pound turntable. 😁

This the ultimate isolation both vertically and laterally. Nothing else comes close. There are painfully few other options that really work. Most of it is just wishful thinking.

@mijostyn

i use the Taiko Tana active resonance control system under my NVS turntable. this system is based on the Table Stable/Herzan TS active isolation systems.

https://taikoaudio.com/taiko-2020/tana-150-140-active-anti-vibration-platforms/

these active systems don’t work for every turntable, just like the passive Minus K platforms don’t work for all turntables either.

but when either approach work, i agree they are awesome.

@nhmanmtb

back 12-14 years ago i purchased 4 turntables from Steve Dobbins, Xact Audio. three were vintage tt’s (Technics SP-10 Mk2, Mk3, and a Garrard 301) with tweaking and plinths built by Steve, and one was his Kodo ’The Beat’. all used Stillpoint footers. at that time i tried other footers, but nothing else worked. it seemed that Steve had voiced his plinth’s for the Stillpoints.

with turntables, proper choice of shelf interfaces and footers are not predictable. turntables are mechanical, and there are too many variables. you simply must try things and listen. it’s all about the whole ’life’ and ’tonal balance’ thing. a 'dead sounding' or 'overly warm sounding' or 'clinical sounding' turntable is the last thing we want.

if your turntable designer likes a particular footer take that very seriously.

about the only thing that is consistent is the benefit of a solid floor, concrete slab typically preferred.