New aftermarket plinth for Technics SP 10 MK2/MK3/R from Acoustand

Your opinion, good.

Dear @billstevenson   : This was posted by Jonathan Carr about that cartridge/tonearm resonance frequency:

" The match (or mis-match) between tonearm mass and cartridge not only affects the fundamental resonant frequency, it also changes the tracking performance. "

R.

I have to disagree with Atmasphere about marrying dissimilar materials in turntable plinths.  If the dissimilar materials are squeezed together, this is called Constrained Layer Damping.  The fact that the two materials will have different resonant frequencies is the strength of the whole idea. Each constrains the other from resonating, and each resonates at a different frequency.  Therefore any resonance of the overall structure is broadened in frequency and flattened in amplitude. 

@lewm I've no problem with this! @dover got what I was talking about:

a better description of what Ralph is repudiating is the term "bimetallic dampening" which is slightly different from constrained layer. This is where two unconstrained materials with similar but slightly different resonant characteristics are combined to dampen.

And it would not hurt to have a constrained damping layer. The point though is that the coupling between the platter surface and the base of the arm be as rigid and acoustically dead as possible.  

@rauliruegas In a worse case scenario I have seen where a mismatch was bad enough to cause the stylus to jump right out of the record groove.  This was not a torture track either.  In all cases of mismatch the sound proves well below expectation and as I said it is extremely difficult to correct.  Most of my experiences have been with cartridges that are way above the capability of the turntable.  It is never a happy circumstance.