Hi Faradayblue,
Any condition that a turntable exhibits that alters the signal the cartridge is retrieving from the record is a detriment and takes us further away from reproducing the sound of the music as it has been captured by the recording team. Unwanted vibration and resonance surely causes a change to the signal and should therefore be eliminated as much as possible.
Felt will damp some ringing and resonances present in the structure of the Thorens but it will not be as effective as more absorptive materials (that are typically more massive). The objective is to convert the mechanical vibration to another form of energy that will not affect the musical signal. Converting the mechanical vibration to thermal energy (heat) is very effective if the transfer is done as efficiently and quickly as possible.
I do agree with Lugnut that you must be careful not to alter the original tuning of the suspension system in a turntable that suspends the plinth with a compliant spring or supports the plinth with a compliant spring. Adding mass to the plinth will change the resonance frequency of the suspension system which the turntables designer has optimized (hopefully correctly). If you do add more mass to the plinth, you can change the springs which comprise the suspension system to compensate.
If the outside frame of the turntable is vibrating or resonating, steps should be taken to eliminate that vibration as much as possible.
Best,
Barry
Any condition that a turntable exhibits that alters the signal the cartridge is retrieving from the record is a detriment and takes us further away from reproducing the sound of the music as it has been captured by the recording team. Unwanted vibration and resonance surely causes a change to the signal and should therefore be eliminated as much as possible.
Felt will damp some ringing and resonances present in the structure of the Thorens but it will not be as effective as more absorptive materials (that are typically more massive). The objective is to convert the mechanical vibration to another form of energy that will not affect the musical signal. Converting the mechanical vibration to thermal energy (heat) is very effective if the transfer is done as efficiently and quickly as possible.
I do agree with Lugnut that you must be careful not to alter the original tuning of the suspension system in a turntable that suspends the plinth with a compliant spring or supports the plinth with a compliant spring. Adding mass to the plinth will change the resonance frequency of the suspension system which the turntables designer has optimized (hopefully correctly). If you do add more mass to the plinth, you can change the springs which comprise the suspension system to compensate.
If the outside frame of the turntable is vibrating or resonating, steps should be taken to eliminate that vibration as much as possible.
Best,
Barry