Tonearm mount on the plinth or on Pillar ?

Most people follow this belief but if you had studied acoustics and the science of materials, you would know that materials react to air-borne sound by a mixture of:-

• Reflection
  
• Absorption (as heat)
  
• Transmission (passing directly through)
  

It is only when sound pressure of a sufficient volume (and that's important) at a material's Resonant Frequency occurs...that the material can 'vibrate'.
You do know of course that the Resonant Frequency of most tonearm/cartridge combinations is 6-15 Hz and this is well below the frequency reproduction ability of all commercial loudspeakers and almost all subwoofers as well?
It in only in this frequency band that any vibration of the tonearm/cartridge can be observed. There is no 'alternate' vibration phenomena unless you can direct us to the relevant scientific papers

Halcor, the second to last statement here is plainly ridiculous- and may be why you are having trouble understanding how this works. The resonant frequency of the arm and pickup is irrelevant- that affects tracking and the ability to play bass but has no bearing on the fact that higher frequency vibrations can be transcribed by the cartridge. Were this not so as you state, it would be impossible for the cartridge to put out anything at all!

You seem to use the term 'vibrate' as if somehow it were a different genus to 'resonate'?

It is unimportant whether the vibration is occurring at a resonant frequency or not- its vibration either way- just more of it if its at a resonant frequency.

If air-borne sound pressure is a problem in the turntable playback system, then every increase in volume would of necessity degrade the sound.

Correct.

There are tens of millions of turntable systems where turning up the volume is heard to IMPROVE the sound quality noticeably.

This statement is false.

Dietrich knows a thing or two about turntables, arms and cartridges.
And gosh....what are those?
They look like tonearm pods and did he say in the interview that the tops of the pods are totally isolated from the plinth and structure?

They look like pods but they are part of the plinth. Go look at the video again. This looks like an excellent machine! It does not support your position.

If any other sound frequency is used there will be NO vibration in the material? This with any energy level in the sound?

Correct....unless you define the transmission of sound through the material as caused by vibrating molecules.

Not in an imperfect world. I am sure the word NO was capitalized for a reason. Damping material damps, but cannot remove all vibration, unless its perfect. It isn't. Its very effective for sure, but not 100%.

No strawman argument from me Ralph, at least not intentionally. I’m with ya, man!

Got it- I sorted that out a bit later.

It is unimportant whether the vibration is occurring at a resonant frequency or not- its vibration either way- just more of it if its at a resonant frequency

Again, I tend to agree with Ralph on this one and find it hard to believe that airborne vibration, even not at the resonance frequency, has no effect on the turntable system playback.

I would propose yet another simple test, similar to the one I proposed before:

 

1.  Lower the cartridge on a stationary platter / LP, ideally the turntable system should be on an anti-vibration platform to filter out the structural borne vibrations,

2. Play music through the CD system,

3. Connect the cartridge to the phono / preamp as usual,

4. Listen to the phono system with a headphone, preferably in another room.

 

I am pretty sure you could hear the music through the headphone (although it would sound funny as it has gone through the RIAA stage).

Yes the capitalized "NO" was deliberate.

Halcro
Can you please explain how we can hear and clearly understand someone talking on the other side of a closed window?
Horrid music, which sounds like a broken washing machine, coming thru the walls of my sons bedroom?

Cheers 

Now here is a serious new turntable...
http://www.analogplanet.com/content/dietrich-brakemeirs-apolyt-turntable-aims-be-worlds-finest-and-m...
Dietrich knows a thing or two about turntables, arms and cartridges.
And gosh....what are those?
They look like tonearm pods and did he say in the interview that the tops of the pods are totally isolated from the plinth and structure?

I saw that video. The tonearm pods are themselves on the same plinth as the turntable if I am not wrong.

So then, is this setup some type of Optical illusion ? 


http://www.whatsbestforum.com/attachment.php?attachmentid=19961&d=1429540940 

That Verdier setup is incorrect. I have owned the Verdier too and have tried various setup configurations. In the setup cited in the link above the motor housing and the turntable are placed on different platfoms, one is on a vibraplane while other is on a regular raised platform. This may give the sound some added transparency due to the seperation but they dont sing like one. The coherency is affected, I have tried it first hand. Probably the person who set it up would never agree to this because he first of all doesnt believe this can happen (hence he set it up like that) and secondly he did not hear this problem after setting it up like that. With all those expensive tonearms, cartridges, isolation platforms, one has invested very well and it is expected that he knows very well what is doing but simple things are some times elusive

Lewm
Verdier photo: It looks to me like Dietrich simply replaced the OEM flimsy tonearm mount (an inverted L-shaped affair that never looked to be very stable, to me) with a nice solid pillar and then attached it directly to the granite "plinth". Nothing really radical but certainly better than stock.

Optical illusion Lewm.

(an inverted L-shaped affair that never looked to be very stable, to me)

An Aluminum block rigidly mounted to its plinth .....unstable ? ok......

Look again. the turntable has been rotated counter clockwise. 90 degrees. The stock pillar is still there holding up the other tonearm. The external pod is not touching the same plinth that the platter is attached to.

Nothing really radical but certainly better than stock.

Well ok if you think so. But "Earth" for both of them, Tonearm Pillar and Plinth that holds the Platter, is now the Vibraplane.

I think you just jumped over to the other side and became one of them Copernicans with your comment ?