And I forgot to mention that some of the most expensive vintage and new turntable plinths use the same technique also, except with a butcher block and a lot of the newer turntables on the market today, there is hardly none to no void - for the vibrations to travel through.
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Recently purchased an RPM 9.2 turntable. Pictured on Icon. It comes with steel shot inside the plinth. Best of all, it has three large feet nearly the diameter of a Campbell’s soup can that have big opposing magnets inside such that it actually floats the entire table on a cushion of magnetic resistance, so to speak. You can push down on one side and it will lean and then gently pop back up level. Its one of the best vibration isolation systems I’ve seen. Like floating on air bags but it’s polar magnetism. No interference anywhere. I have a music listening room built above my two stall garage and spec’d some hearty beams to span the floor underneath. It resulted in some low frequency springing when I’d walk across the room towards the table. Like big leaf springs in a truck. Could not feel it myself, but I could literally see it in my subwoofer, the cone would pulsate with steps. Not any more. I’m thinking someone ought to make these type of opposing magnetic feet as an add on tweak. |
I made some of those opposing magnet isolation feet about 25 years ago for a lightweight Optimus CD player. For lightweight things like that making the magnetic iso feet is not difficult but for heavy things you would have to figure out the size magnets to use and there is the added issue of the danger involved working with very powerful magnets. In addition, there’s the issue with magnetic suspensions involving how opposing magnets slip horizontally creating a slight path for vibration to travel. Nevertheless, it’s a very interesting idea. |
A company called Anvil Turntables used to make a similar product like opposing magnetic isolation feet but you can’t access their site anymore. Curious. http://www.contractorsweldingsupply.com/new-product.html |
@tooblue : "I start out with my trusty, fully loaded with lead shot and sand, Lead
Balloon by Arcci then I place my maple platform directly on top of the
Lead Ballons turntable support shelf which has adjustable spikes to
level things out"Just wondering why you are not using the original lead bars that Arcci supplied for placement on top of the support shelf. These were intended for the turntable feet. Did you find the maple platform to be a better platform for the TT? I still use mine but am wondering if I'm missing something. |
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