Brinkmann vs TW Acustic

My concern with motor on one air isolation platform and the turntable on another and perhaps a flywheel on a third is that one air platform may slightly change in height relative to the others and this would effect belt/thread level and tension which in turn would effect speed accuracy.

It is a similar argument that the proponents of a closed/rigid system use for a fixed arm mount and platter bearing so that the relationship between the two never changes, so alignment never changes.

In the SME case, the arm and platter are fixed, the motor is on a different and isolated level, presumably for vibration isolation. So perhaps SME has prioritized the importance of one over the other.

Dgad,

yes, you`re right it blocks motor vibrations if implemented properly.
This no argument against speed control or not using the Timeline. It is an additional measurement improving the sound. Believe me I worked and experimented a lot on vibration issues. Also the original air dampened Micro base for my SX 8000 II comprises two separated top-bases , one for the motor, one for the drive. To put the exact pressure on the belt or string you can move them closer by a very smart button device on the side of the heavy base. A very elegant and effective solution!

Symposium works wonderful in my system i have concrete over parquet floors with cinder block walls on a 200lbs Rix Rax. Tally Ho!!

Dear Peterayer,
you concern is absolutely okay. You need to level all three platforms in a way that they meet exactely the height you need. I do this with Copulare Coral lifters under the platforms by which you can adjust pretty fine turning the lifter. Just try it - you will not believe what you heard before!

In the SME case you described everything is done well.

Suteetat
CT0517, I only have one motor. It takes around 13-15s for the platter to come to a complete stop when I timed mine (Raven AC-1 with BN battery supply)

Thanks for that info Suteetat.
Is anyone running two motors or three ? Does the 13 -15 seconds elapsed time of a single motor – (platter to a complete stop from 33 1/3) – change when an additional motor is added?

Can anyone supply this data? I will provide some comparisons that I think are interesting and relevant especially if using battery.

Thanks