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N-set wrote:

Romy, would you elaborate on that more? Looking at his formulas it looks like higher mass gives lower resonance point, which is I guess desireable?

Yes, the resonance point go lover but also the ratio of contribution”from platter” vs. “from motor” get changed with increase the platter. If to embrace the filter analogy of the author above then the idler is closer to first order filer and belt is to a second order filter. The second filter has a cap and coil and spins phase much more than a fist order filter. However, if we begin to beef up coil (platter) for instance then we can have a second order filter to operate within Bessel Q and the phase shift will be identical to first order filter.

In more practical terms – with substantial (very substantial) increase of mass makes the system is only platter scenic and the platter’s moment of inertia get dominated. Will, the idler be benefited with increase of platter mass? I do not know. Have you seen any heavy TT with idler? I do not. My presumption is that with increase of platter mass, let say arbitrary that it will happens at 30-50 pounds, the difference between belt and idler does not exist anymore. Or let me to put in this way: the sonic consequences of suspending of the 50 pounds overtake any minute advantages or disadvantages that idler or belt drive will have.

I do feel that substantially heavy platter will make a user do not care how momentum went to this platter. Take a 100 pounds platter (like American Sound TT) and I doubt that you will distinct what kind drive it had.

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