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RE: Try horizontal freedom.

Posted by VW (A) on September 16, 2007 at 18:35:02

In Reply to: Try horizontal freedom. posted by Al Sekela on September 16, 2007 at 15:52:21:

Hi Al, I have looked at weight-specific footers which are designed to lower resonant frequency to a level that is less likely to interfere with the audio band ( such as Sonic Designs 'audiophile' damping feet which are claimed to lower resonant frquency to below 7Hz on a horizontal plane ) and springs which are tuned to a very low resonance frequency. The latter besides looking quite geeky lend themselves to a somewhat unstable and potentially hazardous structure with little written on their efficacy or otherwise ( I tried mower valve springs which obviously weren't tuned but very comfortably supported shelf/component without being too stiff, but sonically didn't cut it ) while the limited reviews available on the U.K. Sonic Designs feet don't motivate to try this approach. How do roller balls serve to lower the resonant frequency to 1Hz on a horizontal plane seeing the (heavy) Wadia fully couples on a vertical plane ( i.e. how did you, or someone else arrive at this measurement)? I am assuming this would only work with a heavily damped rack and that this would be necessary to achieve such a measurement as vertically moving vibration would still have vectors on the horizontal plane ( just going on my rudimentary knowledge of physics from long ago ).

If the argument held that we need to have the audio frequencies generated by state-of-the-art components contaminated with external frequencies to sound musical, then all the across-the-board improvements discovered by those who have explored ultimate vibration control must be imagined ( in response to post by Stu who proposes working with vibration, i.e. play around with skewing the frequency response ).

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