2020 update : JC Verdier La Platine

@mr_gray 

I have great confidence in your endeavours, because your early descriptions of what you were hearing and the unique qualities of the Verdier were exactly as I experienced when I had the Verdier. I’m pretty sure our hearing is similar.

I have not heard the AS mods - but my point was to try the original platter so you understand what the AS is doing. If you do, retry the copper mat directly on the aluminium platter, as I mentioned this combination of metals will provide bimetallic damping. Also would pay to try any other mats/clamps you have lying around.

the AS platter has a void under it.  this is supposed to be filled with silicon oil.  

that’s very interesting - it would probably serve as an energy dump, but the problems with lossy dampening materials and energy dumps like that they tend to store unwanted energy and then at some point it comes back out, and smears the sound. What you really want with unwanted energy in a turntable system is to get rid of it, in the case of my reference TT most of it is dealt with at an atomic level ( my TT uses superplastic zinc alloy as a plinth, any disturbances from 10-100hz at room temperature dissipate within the plinth material via grain sliding at a molecular level ). Any other unwanted energy needs to be dumped to ground.

Might be worth trying the silicon if that’s what Dietrich intended but I think the record interface to acrylic/copper/graphite whatever will probably have more impact in one way or another directly on the sound as well as getting motor/TT mounted as stable as you can get it - keep things as simple as possible.

yesterday i was reading on mats when i discovered people raving about the "mat" i have - i.e. the "SDP" platter addition.

also i read y'day a quote which said (the following is an inadequate abridgement) people like vinyl because everything is resonating which gives a vibe of real music.

anyway i figure this is why we hate a mat if it isolates.  i certainly do.

so i stuck some foam i found into the void on the sdp such that it probably creates the tiniest gap between sdp platter and verdier platter. well maybe not when the record weight is on etc.

WONDERFUL!  colour, tone, life - no longer a grey and frizzy thing.  i am very happy.  i listened to :The River" last night and i heard music and not the system.  It was fantastic.  I migght try and track down the "gel packs" the AS people suggest for this void (or just pump some silicon oil in there and see if it is even better).  but a lump of foam changed it very much for the better.

so for now i will enjoy this and i wait with baited breathe for:

1.  speaker plug upgrade (installing furutech)

2.  wellfloat double isolation platform. 

@pindac i was trying to find panzerholz the other day for a platform.  it is very hard to get hold of in its raw form i find.

@mr_gray I today usually put the description " Resin Impregnated Densified Wood Board Material " This will help with the search and Brands that are equivalents to Panzerholz and Permali will be found.

The Material is as said above, It will be Vacuum Impregnated in a Heated Environment.

The Board will weight approx' 1400Kg/m3

The minimum wanted as a Structure is 50 x 1mm Veneers per inch thickness at a compression of 50%

Veneers are laid as a Cross Grain.

There are Boards from Brands that increase the Veneers per inch by using less than 1mm. This to myself has increased attraction, as does Grain orientation with more angulation than 90 degrees. Again there are a few Brands that seemingly offer added angulation for the Veneers grain.    

I should have also stated that RIDWB is used today by TT Producers with a Broad Market Exposure.

It is used as a material by Bespoke TT Plinth Producers.

It is offered as Sub Plinth and Casing for Audio Devices by other Brands. 

Speaker Producers also use it as well. 

Within Forums it has a growing number who have adopted the material for nearly 20 Years, where it has been the superseded of most materials that has been used for Plinths both Commercial and DIY. 

Considering or Adopting this Material is a route to a betterment, increasing the presence by having  Sub-Plinths adds to the good impression made. 

My experiences suggest the discoveries made will be profound as  a positive impression made.

A member of another forum who has done extensive work with a DD TT, had over the years abandoned their work with Plinths and had become a total advocate of a DIY Resin Plinth, where they also created a following of others adopting same plinth design methods. 

A same DD TT ended up near their home, but was supplied to the owner with a Panzerholz Plinth. 

After being introduced to the TT, the advocate of a DIY Resin Plinth, bought Permali Board and Resin Plinths are yesterdays news.