Vibration Isolation

Any mass-on-spring system works both for vibrations going up to the component or speaker and those going down. What I had in mind is another layer of resonance control that addresses the “residual vibration” on the top plate of an iso platform, e.g., motor vibration, acoustic wave vibration, what gets through from the floor. There will always be residual vibration because the mass-on-spring iso system acts as a low pass filter, so some relatively high percentage of *very low frequencies* gets through to the component or speaker, depending on Fr. Speaker vibration frequencies don’t extend nearly as low as seismic frequencies, maybe only as low as 30 Hz, so in terms of mechanical feedback speaker isolators work very well, indeed, close to 100%.

+1, been using these for about a year with good results. 

I am perfectly happy with the result: my 2 speakers, and dac and the amplifier are on the same desk...I put each one on one sandwiche constituted by pieces of sorbothane duro 70+Bamboo+ cork plates+granite plate +sorbothane+ another granite plate+quartz pieces... on top of speakers 60 pounds of stones.... Almost perfect isolation to my ears...

Nice set-up. That will do til something better comes along. 😛