Michaelgreenaudio
Others like Geoff Kait will use spring (isolation). He and I kind of have a difference in the absolutes of the term isolation but we both believe in springs, we both use springs. If Geoff comes up he’ll explain his idea on spring control.
>>>>>Springs by themselves do nothing. They need mass to perform. The isolation devices that are based on Springs or airsprings employ mass to produce a low pass mechanical filter. It’s called mass-on-spring isolation. The objective is to achieve a very low resonant frequency for the isolating system to reduce the transmission of vibration as much as possible to the item being isolated. For an iso system with a resonant frequency of 5 Hz quite a bit of very low frequency vibration will still be transmitted since the low pass filter is relatively inefficient for those frequencies and will allow ALL frequencies below 5 Hz to be transmitted.
Very low resonant frequencies can be easily achieved using this method. “Mass-on-spring” isolation is the primary method of seismic vibration isolation for audiophile iso devices and for LIGO, the project to detect and observe gravity waves, which requires extreme isolation measures to reduce background vibration to the absolute minimum, isolating the super sensitive optics from seismic vibration.
My Nimbus Sub Hertz Platform, Townshend Seismic Sink, Vibraplane, Ginko iso stand, Vibrapods, bicycle inner tube, Gaia isolators and other speaker isolators - they’re all mass-on-spring devices. Anywhere a spring is used between object A and object B less vibration will be transmitted. You could even call it a damper.