Vibration Isolation

By my calculation 800 pounds would be required to optimally load 4 pads, assuming the calculations in the previous post are correct. 

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

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%.

It can be demonstrated fairly easily the best approach, generally speaking, to vibration isolation and resonance control is the deliberate and coordinated implementation of a combination of mass on spring type isolation and vibration damping for the top plate of the iso system. The art of isolation comes in when interfacing the component to the top plate and interfacing the iso system to the floor or rack, not to mention the choice of damping method and material for the top plate. This attack will address very low seismic vibration, acoustic vibration and “residual vibration” on the top plate that arises from several sources. If it was easy everyone could do it.