2. analog
  3. 183296-174921

Concrete Slabs

Here I go, perhaps stirring up some controversy.

I have two turntables, both sitting on a 400lb 17th century oak chest. The chest in question sits on a suspended wood floor in a 1985 post and beam house. I just started to play Mahler's 9th (DG/Guilini/CSO) on an SME 10 with an Ortofon Cadenza Bronze. It sounds as it should. But the point is that if I stamp as hard as I can right next to the chest, there is no interruption of the sound. Even if I take a deep breath and jump with both feet off the floor—nothing, nothing at all. So, tell me, what may I gain by pouring concrete here, there, and everywhere (as I believe someone once sang)?

Is this reverence for the ultimate solidity of a foundation the same kind of daftness as when someone says an interconnect must be as thick as their wrist, even though the component may pass the same delicate signal through a PCB trace of minuscule cross-sectional area? What are we aiming for?

dogberry
pindac's avatar
pindac
2,864 posts
 

At the present, I am convinced that Phenolic Resin Densified Wood offers a performance due to its properties, that is proving the most suitable for use in a structure.

A TT Plinth or Chassis, Sub Plinth, Speaker Cabinet Baffle or PCB are all today being produced using this type of material.

I have over a period of time had Birch Plywood, Compressed MU25 Birch Plywood and Panzerholz demo'd on same TT > Tonearm as the TT's Plinth. The Densified Wood as the Brand Panzerholz has shown to be the most attractive in use.

I have also been demo'd TT's and CDT's in use with a Panzerholz Sub Plinth Structure and again the noticeable attraction when the material is used is notable.

My in system testing is in the early stages, but there is already enough evidence discovered and attraction created to leave me of the opinion, that selected materials over the years are now most likely to be superseded. 

The following links will show where the Densified Wood such as Panzerholz and Permali are showing their differences in properties for damping and dissipation to other more commonly selected materials.

 https://qualia.webs.com/newdampingfactors.htm 

https://www.lessloss.com/page.html?id=80

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rauliruegas
13,106 posts
 

Dear @dogberry  : As mijostyn said: you have not or are in trouble down there. 

So let it as it's, there is no reasons to change what's in rigth/good operation. Makes no sense to change it.

 

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

grislybutter
3,377 posts
 

next level stuff

stringreen's avatar
stringreen
6,484 posts
 

I had my speakers on spikes which were on solid brass cups to protect the floor which is the ground floor of the house.  I substituted Vandersteen "vandershoes" under the speakers and chucked the protectors.  My wife in the next room said the difference was dramatically improved...so do I 

pindac's avatar
pindac
2,864 posts
 

I have not heard @dogberry's System or set up for his source.

I am certainly not qualified to inform him his set up is correct.

I am with experiences that the outcome has been quite beneficial, even if only assessed as subjective evaluation. There can be no harm in suggesting to the OP that a reconfiguration of the support structure in direct contact with the TT, can create a performance from the TT, that is perceived as for the better.

One advocate of this type of practice has already put the idea of suspension forward.

I have found adding Tiers to a Structure and using certain types of Separation/Isolation Footers between the tiers has proven to be a very valuable inclusion.   

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