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Romy the Cat wrote:

What attracts me to the TW TT is the idea that it is possible to discard anything that we might consider important but to make the platter as a sandwich what the bottom of the platter care bearing but the top of the platter is decupled from the bottom by some kind of anti-resonance layer. The concept I think is superbly powerful. It to plug into the game some very serious materiallogists then I think it might be possible to make an collection of the insertion rings with different level of viscosity and energy-transfers characteristics that might be placed between the bottom and top of a platter and tune the sound of turntable to what is necessary. Very cool idea of making active turntable instead of staticly-made design. Pretend that you get a TT base with a collection of 10-20 insertion rings and you in your own room ( considering how your TT install, what arm, cartridges, and zillion other criteria that influence your sound) is able to tune the TT to sound neutral in your specific circumstances. After you done you return the leftover rings to the manufactures. I think it is incredibly powerful concept, Very liberating concept!

pretend we have the same platter at Tw has with mass-loaded bottom, light top and middle anti-resonance section. The anti-resonance section is not the polymer that TW uses but a two sandwidges of light multilayer mater similar to what Kevin Tellekamp uses - a chemical saturated foam that resonates ant temporary hardening at given frequency. Those two sandwidges are divided by air bubble. Now, we install the TT, set up and then we attach to the platter a bicycle air pump and begin to pump air into the air bubble inside the platter. The air bubble with the raise of pressure presses the side of the sandwidges, changing the frequencies where the sandwidges operate. So, we effectively implement a situation where a platter might be fine-tined for the specific ant-vibration characteristic that might take place in a given TT situation. BTW, the same sandwidges-air-sandwidges decupling might be used between a TT’s base and the tonearms….

If it works then would you like to take it further: be my guest. Let the fantasy to fry and let call the concept as Active Suspension.  Pretend a TT with Active Suspension, eclectic compressor and high precision manometer shadowing psi in the platter bubble. Then pretend an electromagnet at the bottom of the base with an anchor making a mechanical ping to the body of TT. Then a phonostage has a scope hat allows read from the cartridge the bottom base ping. By modifying the pressure of the bubble and changing the ant-vibration and damping characteristics we monitor on the scope a regular impulse response of the entire TT suspension. We can even set a desirable pressure for a given records thickness, pressing type, type of music… whatever….

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