We have been looking at an alternative to magnetic levitation for HiFi isolation. Our aim is to give a wider load range and more stability under tall speakers. The feet have a variety of cool materials. A carbon fibre main body with ebony and brass centre, suspended on a braided nylon web. Our testing has been giving exiting results with string theory feet performing to a very high level and doing just what we hoped. We are now working on a Speaker suspension bridge with these feet. It also gives an option for those who are suspicious of magnetic fields. Take look here.