These are the top of the line stainless steel version.
Read full description below.
Each Set of 4 include: 3/8 -16 to 1/4-20 adapter posts for mounting
$590 per set of 4. - (2) sets available and must be purchased in sets of 4
Price includes shipping to lower 48 and Paypal fees
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Stillpoints Ultra series products are height adjustable devices that are designed to work with not only electronic components, but with speakers as well. These are height adjustable, threaded vibration control components of the dissipation variety.
The principal behind the Stillpoints system is to turn vibrational energy into "work". This is accomplished by a series of internal bearings that directly couple, either via threads or by gravity, to the component or speaker. Vibrational energy is converted into motional energy turning the bearings and thus the energy is used up - dissipated. The more vibration, the more the internal bearings move ("work") , so saturation of energy is not a factor with these devices.
Stillpoints Ultra SS are precision machined from an exremely hard metal so they are more efficient and have even less internal friction for the bearings. Also height adjustable, the SS is the top of the Stillpoints range.
Printed in "The Absolute Sound", Robert Harley reviewed the Ultra Stainless Steel feet under his speakers in place of spikes and concludes that "they produce a huge sonic return on the investment".