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trace speaker cab impedence

Discussion in 'Amps and Cabs [BG]' started by roree, Jul 21, 2008.

  1. roree


    Dec 30, 2007
    nj usa
    I am confused with this. My trace 715x combo has an 8 ohm internal speaker. If I plug in another 8 ohm cab the total output is 4 ohms. What is the total ohms if I use a 4 ohm ext. cab? Is it 6 ohms or 2.6? I am told 6 will be OK but 2 will damage the amp. Trace customer service (Peavey) never bothered to answer my emails on this. Thanks for any guidance. I appreciate the help.
  2. Jaco who?

    Jaco who?

    May 20, 2008
    If the jack is in parallel with the internal speaker, you would end up with a 2.667 ohm load.

    If the jack is in series with the internal speaker, you would have a 12 ohm load, but that's pretty unusual - particularly if the internal speaker is 8 ohms.
  3. Kenbuntu


    Jun 6, 2005
    its 2.6 OHMS. And if im not mistaken that amp can only handle 4ohms?

    If so you CANNOT use a 4 OHMS ext. cab. It will harm it and is not worth doing.
  4. Yup. You can only use a 8ohm ext cab.
  5. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

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