Would an Isolation TT platform further improve my TT?

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.  

Re pneumatic isolators, it might be obvious, maybe not, but using three pneumatic isolators, If it can be done with stability, is better than using four. At least theoretically. The reason is because the total spring rate is the spring rate per isolator x the number of isolators. And since resonance frequency Fr of the system is a function of total spring rate (and mass) you will get lower Fr with three isolators, all things being equal. My original Nimbus employed only one (!) pneumatic isolator, which is how I got the Fr down below 1.0 Hz. As opposed to air bladders and bicycle inner tubes, tall and narrow pneumatic isolators have the ideal geometry.