XLR Wiring Question

Discussion in 'Accessories / Connections' started by Stratos, Dec 6, 2009.

  1. Stratos

    Stratos Guest

    Hi, I'm redoing the connectors for some cables that will be used with the Shure 58A microphone. When I opened up the XLR connectors, pin 1 and pin 3 are shorted with a copper wire. Is this really needed?

    I thought normally the XLR convention is:
    1- ground
    2- positive
    3- negative

  2. jg49

    jg49 Well-Known Member

    Oct 16, 2008
    Frozen Tundra of CT
    The shorting of pin 1 and pin 3 is usually done when making a balanced to unbalanced cord for example XLR to 1/4" TS, if you are making XLR to XLR balanced cables you should not jump these two pins.
  3. Stratos

    Stratos Guest

    thanks, jg49.

    So i'll keep the wires separate for XLR to XLR cables.
    If I'm making an XLR to 1/4" TS, is the shorting really necessary?
  4. Kev

    Kev Well-Known Member

    Nov 13, 2001
    depend on situation and equipment
    See the Rane Library for interfacing notes for a good description and various methods


    look at the Fig3
    Test Cable

    this is cool cos you can try before you commit
    while things are plugged in and signal is flowing
    you can hear the effects of the Sheild to Pin 3
    OR shield to Pin 1
    and listen for earth loop issues and the level of the noise floor

    I know the topic was initially about the 58A mic and this was supplied with the short

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