Direct Drive turntables

Dertonarm,

absolutely oil pressure bearing and maybe magnetic all serve the function it seems to me - which is to remove the impact of noise transmission from the drive system. If you think about it, typical bearing systems are rather crude whatever material, stainless, ruby, ceramic etc. By reducing the coefficient of friction one has to also reduce the impact of physically induced vibration, noise and mechanical artifacts from the platter. I have not really thought about this too hard, but heavy metal platters would probably amplify noise that will be transmitted through the sensitive cartridge. Could be something that Teres and Redpoint and Galibier figured as they have experimented with varying platter materials?

Steve

Hi Raul,

So I have heard Albert's journey to DD extensively as well as my own (post above). And while I do agree with you the only 100% proof on DD vs belt is only to change one varible.

However, many of us have heard so many arm, cartridge, table combinations we begin to associate traights or signatures that seem to remain constant as we go from one to the next.

In my case, no belt drive gave me the realness of a piano, the impact, decay, power, that I comment on above. Others posted this as a "timing" improvement, and that's a better way to describe it. And it's not just in the piano, listening to Phil Woods right now and this trumpet has bight, power, delicacy that I just didn't have before on my SME 20/2.

So when I heard similar "timing" things at Albert's house, between his Walker and his Technics (belt vs DD) the conclusion to me is inescapable. This doesn't mean the Walker is now bad, it's still a incredible table.

I evaluate analog as a system "table, arm, cart, arm cable" And in this context these DD "systems" keep coming up superior to some of us in this timing area.

In Albert's case, his dd system was going up against a killer belt drive system. I'll also comment the workmanship he and his partner have put into his plinth is extraordinary and it's a major contributor to his "system" I'm seeing a few copies, but his is very unique with the type of wood, the construction, and the finish. It's one of the very best turntables I've ever heard. Plus the power supply improvements in his SP10 mkIII help also.

I am very happy with my analog "system" around my Grand Prix Monaco. Very happy DD convert here.

Steve, agreed. My postulate for heavy mass in platters does include that these platters are composite materials which do dampen each individuals inherent resonance behavior. Metal (gun metal, aluminum, lead, stainless steel, copper - all do have their individual virtues in TT-platter application ) isn't "bad" by nature in platter design, but needs "work" - as all other materials - to produce what is possible.

Cheers,
D.

Dear Jfrech: +++++ " And while I do agree with you the only 100% proof on DD vs belt is only to change one varible. " +++++

that's all I'm talking about not questioning what you or other people heard.

Regards and enjoy the music,
Raul.

Raul,
Absolutes are difficult to support in any case.
As you realize, doing a controlled-environment test where everything else (platter and materials, bearing, isolation/suspension, plinth, arm, cart) are the same is quite difficult. I can imagine a technical construct where one could do so, but I have been ridiculed on these pages before for asking about it :^) so even a well-implemented solution would obviously have its detractors. So we are left with the opinions of people who spend a great deal of time and effort trying to "get it right" and each one provides their own opinion based on their own experiences - there are few people who have spent any serious time listening to cutting-edge implementations who would disagree that it comes down to the whole of the implementation rather than a single piece of it. While arms/carts can be moved around from table to table relatively easily so as to provide a 'constant' reference, set-up is yet another issue to deal with. So it obviously comes down to a "in my opinion, in my system" kind of opinion, and it seems that is the spirit in which the posts have been made to answer the OP's questions.