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How to isolated stand from springy floors?

I currently have a relatively heaving stand with a couple tube amps and a turntable on it. My big issue isn't really sound quality but my concern over tube life. My Manely Stringray II makes an audible tube rattling sound when ever my fairly light self walks by and I hoping I can come up with a fairly simple and hopefully cheap solution to this.

What would you guys suggest? Damping the underside of the shelf the amp is on comes to mind or possibly some sort of iso feet for the whole rack to cut down on vibration.
ohnofiasco

Showing 2 responses by lowrider57

lowrider57's avatar
lowrider57
5,418 posts
 
Regarding tube damper rings on small tubes found in preamps, I have noticed tighter bass and reduction in microphonics from airbourne sound waves.

http://herbiesaudiolab.net/rx.htm
lowrider57's avatar
lowrider57
5,418 posts
 
From your pic it looks like hardwood, IOW a floating floor, so how are tighting up the joists of the subfloor going to help? There will still be some "spring" in the floor.
Even with mass loading, there will still be some bounce. The floor needs to be damped, with the addition of isolation footers under the component and if possible, isolation under the shelf.

Also IME, do not put any iso feet under the rack; it is likely to affect the performance of your TT. I'll bet your TT is very happy being on a heavy stand touching the floor.
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