What is the best deadening material in TT base

[Freddymac]

I have a hollow plastic TT base that seems to pick up and transmit noise.
What can be used inside the base, to minimize feedback. I was thinking about building a 3/4" wood box snugly around the outside of the thin plastic body of the turntable. Any ideas would be great.

 

[tvi]

Mass Loaded Vinyl like
https://acousticalsolutions.com/product/audioseal-sound-barrier/ is easy to cut and glue, its cheap enough to experiment with. If you can find a car audio installer they might even give some offcuts?

You didn't say what the turntable was, but most plastic Japanese turntable have a thin Masonite (hdf?) bottom cover that could do with damping

regards
james

 

[Jerms]

If it's mass loading and deadening like you might use in your car to stop the panels drumming/flexing....
Dynamat or dynamat extreme or aluminium/bitumen flashing tape. All are self adhesive.

DYNAMAT Sound Deadning Xtreme Extreme 1 Sheet 270MMX450MM | eBay

J.

 

[Freddymac]

I have heard that Dynamat melts over time, it sure looks like the right stuff. I am also replacing the Masonite plate with wood. Thank you for all of your ideas. The TT is a Sony PS-LX5 and other than the fact that I can't get a spare headshell for less than $80 it works very nicely for me.

 

[Rhythm Willie]

Decades ago when I had a plastic direct drive Yamaha TT I loaded the base with plastacine (could use Bluetack but expensive.) This made a massive difference to the feedback and improved the sound quality.

 

[Simon1972]

It depends on the frequencies and amplitudes you want to minimise

 

[Freddymac]

The Sony does everything well, but it picks all vibration like a tin can. I am almost willing to build a solid wood perimeter clamping frame if anyone thinks it will stop the transfer of sound back into the base. I am afraid of clay melting in the heat.