Turntable isolation

I designed a dual layer heavy mass-on-spring iso system somewhat based on the Super Duper isolation systems employed by LIGO in the experiment to observe gravity waves, the amplitude of which are on the order of an atomic nucleus. The trick is to sufficiently separate the Fr of the two mass-on-spring subsystems so they won’t interfere. Brad at Revelation Audio has the only Nirvana Dual Layer iso stand out there. The Nirvana employs extremely hard NASA grade ceramic cones to support both the stand itself and the component on the top shelf. Did I mention VERY heavy masses? Give me a stiff enough spring and I can isolate the world. 🌎

One possible issue with any turntable springs is that they aren’t the correct spring rate to be able to handle the extremely low frequency of the seismic vibration. It’s neceassary to get the total Fr down to say, 2 or 3 Hz, ideally, before very good performance kicks in. Alternatively, you can load the existing springs with a heavy slab of granite to reduce Fr.

I can’t think of a single turntable, modern or otherwise, that uses Sorbothane feet. Maybe there is one somewhere.