Would an Isolation TT platform further improve my TT?

Would you put performing musicians on active isolation platforms too ? Remember, seismic activity, traffic etc.
Only passive isolation, my friends, active will introduce subtractive colorations - often the worst kind of colorations.

@inna that is a nonsensical comparison. The task of a stylus retracing the groove is to all intents exactly the same as a microscope or scientific instrument and hence solutions that work for the latter will assist the former. This is one area at least where there is hard and obvious science and designers like Mark Dohman have integrated these approaches into their tables

you are right regarding subtraction however, for example subtraction of motor noise, as you can clearly see in the traces posted in my system ... 😉

and Geoff while I agree in principle I should warn that if you are thinking of using an active or spring based approach a rigid support is the way to go, lest the problem of conflicting spring Fr you referred to, or potentially (in the case of a Herzan) even feedback!

A rigid frame actually transfers vibration more efficiently than a rickety frame.

Correct! Well, even a stopped clock....

But even then its not really right now, is it?

What about frequency? What about amplitude? How much and how fast?

Because, there’s this thing, and its kinda old school, really old school in fact, probably not something they teach theoretical physicists these days, but back in the day we called it Newton’s Law. They even made us memorize f=ma. Force equals mass times acceleration. Woo-hoo! I still remember!

Anyway, and I know math is hard and everything (not to mention beneath a reigning theoretical physicist) but it seems to me that from this equation if you use enough m then even a lot of f is gonna result in practically zero a.

But I dunno. Maybe codename should check the math for me?

I don’t see rigidity in the equation F=ma. You must have better eyes 👀 than I do. The problem generally for rigid racks is they move right along with the entire building’s motion. Even something as massive as a building is moving in all 6 directions due to seismic type forces. That’s why decoupling the component is the only real solution to the low frequency vibration problem. Mass per se doesn’t save you.

Seriously this is all you need: AT616 Pneumatic Insulator, on 4 of them you can place any equipment from 10 to 60 kg (and level each insulator individually). They are very rare, i've been looking for original manual for a long time and finally i got it, very impressed by the data in the manual. I am a Luxman owbner too (PD-444), Stillpoints can be an option too if you want to replace stock footers.