Fastest Audio Cable -- Really!

Discussion in 'Electronic Equipment' started by DaveC, May 8, 2013.

  1. DaveC

    DaveC Guest

    DaveC, May 8, 2013
    #1
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  2. DaveC

    DaveC Guest

    There is a whole industry based on selling very expensive hi-fi hardware
    It's all about not having the technical wherewithal to distinguish between
    fact and fraud. Really. Some folks are just unable to know who is telling the
    truth, standing in front of them. So, I think the wealthier of this class
    simply think "Best to spend more $$ just to be sure."

    That's the best I can come up with to explain the phenomenon of the market.
     
    DaveC, May 9, 2013
    #2
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  3. DaveC

    N_Cook Guest

    N_Cook, May 9, 2013
    #3
  4. I know a guy who claims that he can hear when a digital audio signal
    cable produces jitter or other data transmission errors like retries
    and too many handshake requests.

    What can a cable do wrong?
    Firstly there may be undefined and changing contact resistance
    at the plugs and at the crimp connections.

    Then there may be a bad shielding and interference with local EMF
    fields from 50/60 Hz up to the whole radio band frequencies.
    Although they are analog signals, they add to the digital signal
    in form of jitter noise.

    Then there are reflections at both cable ends if not within the cable
    itself also. The impedance at the connector ends changes a little even
    in a good cable. You have to unroll the individual wires and spread
    them out for the crimp or solder pins. The way how that is done
    influences the standing wave ratio, SWR, of the transmission line.
    Reflections also add to the jitter noise and cause parasitic mantle
    currents. The cable may start to transmit like an antenna.
    Thousands of times the governmental radio monitoring services
    had to search and find bad digital data transmission cables,
    mostly from badly connected computer networks.
    A digital audio connection is just such a thing.
    When you have bad luck, and the cable lengths fit into the civil
    air band airport tower frequency of your neighbouring airport,
    you better hide when they come after you.

    Then there is the question of homogenity.
    Has the cable been bent sharply, quenched or otherwise
    mechanically mistreated?

    While the above sales advertizing is rather laughable,
    no RF engineer will laugh when it comes to low noise
    HF transmission over cables with connectors in between.
    The engineer will have a bad time unless everything is thoroughly
    checked with oscilloscopes, frequency analyzers, SWR bridges
    and reflectometers.

    This was the main thing in short, but the list is incomplete.
    w.
     
    Helmut Wabnig, May 9, 2013
    #4
  5. Mike Kaddaver, May 22, 2013
    #5
  6. DaveC

    Robert Baer Guest

    No, no, no.
    Yah gots it awl rong.
    Eet Ees een mar-que-tyng.
    Zee improved cable is the result of decades of engineering
    improvements culminating in a secret, patented design that completely
    contains full brilliance, tempo and timing of your favorite music.

    Und so wieder..
     
    Robert Baer, May 22, 2013
    #6
  7. DaveC

    rickman Guest

    Duh! Do you really not know that looks mean more than brains?

     
    rickman, May 23, 2013
    #7
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