VPI Rim Drive vibrations

Wasn't there an issue with the Superplatters being out of round? Which could raise havoc when one is combined with a VPI rim drive. Perhaps that was much of the OP's problem. Personally, I think both the plinth and the external rim drive system (any rim drive system, not just VPI's) should be firmly joined together and very rigid, no movement at all between one and the other should be permitted. Further, the rim drive apparatus should be very massive. (Let's not forget Newton's Third Law of Motion; the rim drive torque promotes a tendency for itself to rotate opposite to the rotation of the platter.) But that's just me.

I agree Lewn....and Harry agreed with me as I was going through this issue with him, that the Superplatter isn't and I was told just can't be made with the tolerances needed to work with the rim drive....that's one of the big (maybe the biggest) reason the Classic platter was/is manufactured. By solidly anchoring the platter and its ancillaries to my very solidly supported table via the BearPaws, and allowing the errors of the non-round platter to be accommodated with the sprung support of the motor assembly, I was able to eliminate the rocking of my then 10.5i. That rocking was making me nuts to look at it in operation..surprisinglyl not heard to that great extent in the listening. The motor assembly would dance in time with the non-roundeness, but that didn't bother me as much. However, I wouldn't rest until I found my fix.

The Super Platter had a problem with the Delrin seperating from the stainless steel middle sandwich on a few examples, not all. In addition, manufacturing the Supper Platter cost 3 times that of the Classic platter which would drive its retail price to over $2K!

Delrin and stainless steel are machinable to a very high standard and can be machined to the same tolerance as the aluminum Classic. If using a rim drive with a Super Platter, it should be run on the middle ss portion. My Super Platter was perfectly round and had the same perceived manufacturing tolerance as my Classic platter. The two platters sound different, and not necessarily better than the one another.

BRF...you evidently have the Super Duper Platter.....mine was not good at all.

Stringreen, I own or have owned the TNT 3,4,5, Super Platter, and Classic platters. My order of preference is Classic, TNT5, Super Platter, TNT4 and lastly the TNT3.

I can easily understand how someone may prefer the Super Platter over the Classic. They are both excellent platters that do things differently. For some Super Platter owners, a change to the Classic could be deemed a downgrade based on their listening preferences.

Having great results using the new Edensound Terracones recommended by members of this thread to eliminate the vibes on my VPI HRX; I have decided to experiment with the Edensound dampers on the four corners on my Motor Flywheel HRX Rim drive. I have been using the Walker Audio 1 inch large disc for years to add additional damping to the Rim vibrations.

I am rather amazed that the new 4 Edensound damping discs (1 inch and 1 lb.) worked so well. Just using the Terracones footers has stopped the vibration when my fingers touched the Motor drive flywheel rim drive. After placing the 4 damping discs at the corners of the HRX Rim drive, and started the spinning turntable platter process, the damping discs was shaking and jiggling when I touch it with my fingers. That gave me evidence that the damping discs are eating up hidden vibrations on the Rim drive, although it "felt" non-vibration on the motor drive.

The improvements are deeper and well defined lively bass with added slam impact. The upper mid range and highs are crystal clean sounding. The smash on the drum cymbals are explosive. I found the tailing decays from each singer have added lingering musical notes.

I am quite impress the Edensound damping discs 1 inch 1 lbs. has added great value to the elimination vibration of the rim. However don't over damp using the 3 inch 2 lb. damping discs. It may filter out some treble highs.

It may depend on your set up to get these improvements. The fun is spending low costs to gain listening joy. I hope this info maybe of use if you are looking to eliminate more rim vibrations.