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How do I hook up three cabs?

Discussion in 'Amps and Cabs [BG]' started by Busker, Aug 5, 2007.


  1. Busker

    Busker

    Jan 22, 2007
    I did a search, didn't see anything specific.

    How do I hook up 3 cabs to a head with two speaker output jacks?

    The cabs have one input each on the back.

    I assume a special speaker cable is needed to daisy chain two of the cabs? I don't know, never done this before.

    BTW, it's three 8 ohm cabs and a 2 ohm minimum head. According to that ohms calculator someone posted here (thanks!) with three 8 ohm cabs it should be about 2.66 ohms. But I guess you'd have to have the cabs hooked up correctly to get that, right? Help!
     
  2. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    Add another jack to one of the cabs.
     
  3. RWP

    RWP

    Jul 1, 2006
    Yeah, Bill's right. You 'could' make a special parallel cable but it would be problematic. If your cab has a input plate on the back with room to add a jack that would be the answer. Then wire that jack in parallel with the input.
     
  4. RWP

    RWP

    Jul 1, 2006
  5. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    True, But I've used these same adaptors with my (high-powered)
    P/A speaker cabs/monitors for over a decade without issues.
     
  6. Busker

    Busker

    Jan 22, 2007
    Thanks all!

    So, if I add a 1/4 in jack to one of the cabs, wired in parallel, problem solved, and that will bring the load down to 2.66 ohms?

    Or will it be 4 ohms, as if you had two 8 ohm cabs hooked up?
     
  7. seanm

    seanm I'd kill for a Nobel Peace Prize!

    Feb 19, 2004
    Ottawa, Canada
    Still counts as three cabs, so 2.66 ohms.

    The two jacks on the back of the amp are just wired in parallel.
     
  8. Masher88

    Masher88 Believe in absurdities and you commit atrocities

    May 7, 2005
    Cleveland, OH
    What cabinets are you using? Most cabs have 2 inputs on them already wired in parallel
     
  9. Busker

    Busker

    Jan 22, 2007
    GK Backline II
     
  10. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    If you connect two 8ohm cabs together in parallel, (with any method) you'd have a 4ohm load.
    If you then add another 8ohm cab (that's also connected parallel) to these two, your tree cabs would end up with a total load of 2.66 ohms.
     

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