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Comparing Elements of Turntable Construction, Kindly requesting your help in building a turntable comparison chart.
Knowzy
post Aug 19 2008, 03:06
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Greetings HydrogenAudio.

USB turntables, as many around here are aware, range in quality from poor to decent. I'm setting out to create comparison charts detailed enough to find the gems in a sea of lightweight plastic and ceramic carts. Once the guide is more presentable, I plan to give HA an exclusive sneak preview.

What follows are the elements I'm considering for chart #3, "Turntable Construction," along with the possible values.

Is there anything else I should be considering? Are there any elements not worth comparing or combinable with other elements? Am I using correct terminology?

I greatly appreciate your informed input.
  • Drive
    • Belt
    • Direct
  • Cartridge Type
    • Ceramic
    • Moving Magnet
    • Moving Coil (no USB TT's feature these)
  • Plinth/Body (really having trouble succinctly comparing this)
    • Lightweight plastic/No isolation
    • Heavy plastic/Rubber
    • Metal/Rubber
    • Wood/Rubber
  • Anti-skate/Counterweight
    • Yes
    • No
  • Edit: Removed tonearm shape, combined counterweight with anti-skate (thanks for setting me straight Axon)
  • Mount Type
    • Half-inch
    • P-Type
    • Edit: Bayonet (thanks Axon)
    • Edit: Universal (thanks Axon)
    • Edit: Proprietary (thanks Axon)
  • Stylus Type Edit: Added more types
    • Conical
    • Elliptical
    • Spherical
    • Linear Contact
    • MicroLine
    • MicroRidge
  • Dustcover
    • Plastic
    • Cloth
    • None
  • Adjustable Feet for Leveling?
    • Yes
    • No
  • Tonearm cue?
    • Yes
    • No
  • Tonearm Auto return?
    • Yes
    • No
  • Edit: Specs (If Available) (Chart #4: Specifications)
    • Wow and Flutter
    • Signal to Noise Ratio
    • Rumble
    • Dimensions
    • Weight
    Edit: Pitch Control (chart #2) (thanks Axon)
    • +/- X%


This post has been edited by Knowzy: Aug 21 2008, 07:03
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Axon
post Aug 19 2008, 03:43
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So kind of you to give us a sneak preview of our own submissions.
  • Some turntables might have proprietary mounts (Crowley?).
  • Many turntables do not have antiskate adjustment.
  • Some turntables might not have a preamp out (or might not have an unamplified cartridge out).
  • Tonearms are judged as being "offset" or "straight", not "S" or "straight" (many straight arms are offset).
  • Some tables have 78rpm and reverse speed options.
  • Stylus shapes run a far wider spectrum than those 3 and several of those have radius figures attached to them.
  • "Universal" mount doesn't exist as a tonearm type (it's only for AT carts that work in both P-Mount and 1/2" situations).
  • However some tables use bayonet headshell sockets. Some cheaper models may not though. Some carts actually screw into those directly (Ortofon Concorde IIRC) and there are good uses for that for 78s.
  • Pitch adjustment
  • The basics: wow/flutter, SNR
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