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Springs for homemade isolation stand

I want to suspend my granite top from my Sound Anchor rack w. some springs to create an isolation stand. I have about 100 -200 lbs of equipment on the granite top including a turntable. I was wondering if anyone can recommend a source for the springs that can support the weight & control resonance.
dgad
porziob
316 posts
 
Koni racing shocks are the answer.
dgad OP
782 posts
 
I had Koni's on my car when I was a kid. They were great new but after a bit of use they softened up and were a little mushy. I always thought I should have changed my springs as well.

Take a look at the Minus K stands. They only use springs. It is amazing how effective they are based on the video.
geoffkait's avatar
geoffkait
23,365 posts
 
"Take a look at the Minus K stands. They use only springs."

Well, almost. They use combination of springs and "flexures" (beams under compression) - a technically complex isolation technique called "negative stiffness."

Once upon a time, around 8 years ago, Newport Corp. sold the Sub-Hertz Platform - also a negative stiffness isolator with Resonant Frequency circa 0.5 Hz.

Cheers,
GK at Machina Dynamica, Vibration Isolation and other stuff
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