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  1. 04-15-2004, 08:15 AM #9
    Audie Oghaisle
    Audie Oghaisle is offline
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    Aug 2002
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    Way back when...

    ...turntables used idler wheels and the like to transmit power and change speeds of the platter...Carts of that time period were a. mono and b. limited in freq response...as cartridges evolved, motor noise(as vibration)became an issue...older gear actually had what was known as a "rumble filter" or a low freq filter to attenuate those freqs...a belt drive TT is designed to isolate the platter/record/cart/tonearm combination from motor vibes and other airborne/ structure borne sources of rumble and feedback...

    Direct drive TTs came about when drive motors were developed that could reliably rotate at playback RPMs...still many prefer belt drive over DD...

    Gears would transmit even more noise.

    Audie
    Last edited by Audie Oghaisle; 04-15-2004 at 08:35 AM. Reason: addendum
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