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Tonearm mount on the plinth or on Pillar ?

Folks,
I am looking to buy a custom built turntable from Torqueo Audio (http://www.torqueo-audio.it/). They have two models, one with a wide base plinth where the tonearm would be mounted on the plinth (as usual) and the second is a compact plinth where they provide a seperate tonearm pillar to mount the tonearm. According to them the separate tonearm pillar version sounds more transparent and quieter because of the isolation of the tonearm from the TT. My concern is whether seperating the tonearm from the plinth would result in a lesser coherence in sound ? Isnt sharing the same platform results in a more well-timed, coherent presentation ? Any opinions ?
pani
richardkrebs
422 posts
 
Halcro
accoustic excitation....
firing sound at the material.
putting the material in an environment where sound is present. 

Ok again for clarity.... 

Under circumstances where we fire sound at a material.....
Are you saying that the material will ONLY vibrate at its resonance frequency, assuming that this frequency is present in the sound?
If any other sound frequency is used there will be NO vibration in the material? This with any energy level in the sound?
halcro's avatar
halcro
2,664 posts
 
Under circumstances where we fire sound at a material.....
Are you saying that the material will ONLY vibrate at its resonance frequency, assuming that this frequency is present in the sound?
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.
During Sound Transmission Testing of walls for apartment buildings, we test at all frequencies from 20Hz to 20,000Hz at SPL up to 100dB.
The resonant frequencies of all masonry and combination plasterboard/stud/insulation fall well below the audio band and no vibrations are detected.
Glass walls of certain sizes and thicknesses can be induced to vibrate at their resonant frequencies (20-30Hz) at high SPLs.
ct0517's avatar
ct0517
2,041 posts
 
Fixed Pillars/Armpods with a Suspended table ?

Lewm

Would you use an outboard arm pod with a suspended turntable? I don't think so.


Bdp24

True, a suspended-subchassis table will always have a plinth common to the platter bearing and arm pillar (at least as far as I know!), while a non-suspended doesn't have to, the later fact the impetus for this discussion.


I agree with both Lewm and Bdp24.   

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


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


The turntable appears to be stock to me.   The Armpod has been carved to fit around the plinth. The outboard Pillar/Armpod is an accessory product made by Acoustical Systems.

Now Henry says -

Dietrich knows a thing or two about turntables, arms and cartridges.

So Henry, any idea why Dietrich has put what looks like a fixed pillar/armpod on this customers suspended turntable ?  
ct0517's avatar
ct0517
2,041 posts
 
Halcro
That is the most unlikely scenario. Airborne induced vibrations in the platter/tonearm/cartridge synergy are virtually non-existent as the turntable world would have ceased to exist if this were not so.


I am very disappointed that you did not tell Ralph to yell at his cartridge. 

just sayin....

halcro's avatar
halcro
2,664 posts
 
Haha...
Yes Chris, I remember that from years ago.
Everyone can try that test.
Just place your mouth close to the cartridge while playing a record and yell at the cartridge/tonearm.
If airborne sound waves are ever going to be heard it should be under this test.....

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