Tonearm mount to the plinth vs arm board vs rotating arm board vs isolated tower


Hello,

I am rebuilding a Garrard 301 and looking for a plinth. I am planning to buy 3-4 tonearms to try. I would like to know which is the best way moving forward.

Is there a difference between mounting a tonearm directly on a solid plinth vs arm board (same vs different materials) vs rotating arm board vs isolated tower. 

Thanks
Nanda
kanchi647
Not sure what is best for your turntable but in my experience you can get great results putting the tonearm on a tower separated from the platter/plinth. In fact I have the motor, flywheel, platter/plinth, & tonearm tower all separate. Each "component" sits on Isoachostic feet. The flywheel, platter/plinth, & tonearm tower are on the same platform, while the motor is on a separate platform. 
The flywheel, platter/plinth, & tonearm tower are on the same platform, while the motor is on a separate platform.
Well done @boxer 🤗
Would love to know your System....?
Not sure what is best for your turntable but in my experience you can get great results putting the tonearm on a tower separated from the platter/plinth. In fact I have the motor, flywheel, platter/plinth, & tonearm tower all separate. Each "component" sits on Isoachostic feet. The flywheel, platter/plinth, & tonearm tower are on the same platform, while the motor is on a separate platform.

Do you mean toneam pod ? Who made them for you ? Images maybe @boxer12 ?

Essentially the problem is that the tonearm and cartridge are designed to have resonant frequencies Fr around 8-12 HZ (well below the lowest speaker frequencies) which ARE in the range of *very low frequency* seismic type vibration coming from the floor. So, that structural vibration can excite the natural frequencies Fr of the tonearm and cartridge. Sadly, damping techniques are not very successful for these *very low frequencies*. If they were LIGO wouldn’t have had to wait 20 years for the development of sufficiently good isolation techniques to observe gravity waves, they could have used damping techniques. But isolating the turntable from seismic forces is very effective, especially when the Fr of the isolating system is 3 Hz or lower.