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In the Forum: Analog Playback
In the Thread: Rim drive?
Post Subject: Motors for big plattersPosted by IslandPink on: 5/11/2011
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 Romy the Cat wrote:

I personally tend to use TT with heavy platters and I feel that if a platter is substantially heavy then there is no different how you would drive the platter. Put a platter of 100kG then you will never recognize HOW the platter was pushed. So, all of these conversation about platters and way to drive them are for light platters, for heavy platter it is all become less and less relevant, up to the point of being irrelevant.

The Cat


Like you, Romy, I did (intellectually) believe that the drive method on a heavy platter would make little difference.
I did however decide to spend a fair amount of money ( based on one or two reports from trustworthy contacts ) to try a rim-drive ( and more powerful ) motor on my Nottingham Hyperspace.
The Hyperspace has a 13kG platter made as a two-piece combo of aluminium alloy topped with carbon-ceramic.
It's normally driven by a small and weak AC motor and belt drive, aim being to make the motor noise as low as possible.

As I mentioned above it was really obvious within a few seconds that the rim-drive motor had improved the sound substantially .
Improvements were greatest in the bass but extended through to the midrange .
It's still quite hard to believe that the stylus drag can affect the speed of a platter this size, in any audible way, but it must be true .

I haven't had the option to hear this effect on a 100kG platter , but I guess it would be less.
However, I dont think many platters out there are really 100kG , or whether any of them are any good .

MJ

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