On what material should I place my TT

[prem]

Hi Record Player, also try on a 2 inch thick Rosewood shelf with a 5 mm hole in the centre. My table is on a similar rosewood shelf

 

[Record Player]

Hi Record Player, also try on a 2 inch thick Rosewood shelf with a 5 mm hole in the centre. My table is on a similar rosewood shelf

Excellent. Can give this a try as well and actually have this cut to spec of the glass and replace that with Rosewood with the 5mm hole in the center.

 

[prem]

Try and get the rosewood or what is called sheesham in the market dried in a kiln to remove moisture. You are unlikely to get one large plank. You can glue two or three smaller planks. Do not use any nails or screws to fix them.

 

[Hiten]

In my limited experience I have found acoustic vibrations also affects TT. To demonstrate I have created following demo. An ideal situation for speaker and other vibration to creep in to cartridge. With feedback 'mostly' from the air that particular frequencies/noise is increased. Here is a demo. Feedback

All things related to vibrations affects the Turntable. floor vibrations, air vibrations, inherent TT vibrations. But as G401 has rightly said base of a suspended TT will have less significant effect. Suspension
Peeps say with AR XA suspension turntable one can strike a hammer to plinth with no effect to suspended chassis.

But still tinkering with turntables is fun and is immensely enjoyable part of refining Analogue sound.
Regards.