Repair Question - Measuring cabinet impedance | The Canadian Guitar Forum

Repair Question Measuring cabinet impedance

Discussion in 'Amp Building/Technical/Repair' started by hedzup, Nov 30, 2019 at 1:36 PM.

  1. hedzup

    hedzup Gold Member

    Joined:
    Apr 23, 2009
    Location:
    Ontario
    Can you measure the impedance of a speaker cabinet with multiple speakers at the input jack ?
     
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  2. greco

    greco Gold Member

    Joined:
    Jul 15, 2007
    Location:
    Kitchener, Ontario
    You can measure the DC resistance at the jack. It will be slightly lower than the rated impedance (e.g. 8 ohms impedance might read 6 - 7 or so ohms DC resistance).

    EDIT: If you can't easily get at the jack, @laristotle 's approach below will work. Using a short cable is best.
     
    Last edited: Dec 1, 2019 at 8:54 AM
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  3. laristotle

    laristotle Gold Member

    Joined:
    Aug 29, 2019
    Location:
    acton
    Plug a cable into the speaker jack.
    Hold the multi-meter black tip to the sleeve of the jack at the other end of the cable, red tip to the tip of the jack.
     
    Todd MacCulloch, hedzup and greco like this.
  4. hedzup

    hedzup Gold Member

    Joined:
    Apr 23, 2009
    Location:
    Ontario
    Thanks guys!
     

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