4/16 ohm switch

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by SteveStrat, Feb 7, 2006.


  1. SteveStrat

    SteveStrat Member

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    Does anyone know where to get a slider switch that goes in the back of speaker cabinets that allows you to split the speakers between series and parallel? I want have the option of switching my cabs between 4 and 16 ohms.

    Steve
     
  2. teefus

    teefus Supporting Member

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    how many speakers ? if you have something like a 2x12 you can wire the speakers up to be parallel (2 speakers, 2 jacks each, with a short jumper for parallel) and then use a series box when you want to run them in that configuration.
     
  3. SteveStrat

    SteveStrat Member

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    Right now I have two 2x12's each running at 4ohms, ( 2 8ohms speakers in parallel). I get the two jacks each speaker but you loose me with the "series box". Can you gimme some more details?

    Thanks for the info

    Steve
     
  4. KLB

    KLB Member

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    This link discusses the 1960 Marshall cabinet, the one with a stereo/mono switch and 4 ohm or 16 ohm load depending on which of two jacks is used in mono mode.

    http://www.attentiontodesign.com/ax84/stevec/1960cab.html

    You can eliminate the switch and wire the two Marshall-style switching jacks together as in mono mode. Instead of two 16 ohm speakers in parallel for each side, you would have one 8 ohm speaker for each side.

    I put a dual jack plate in my 2x12. I can get 4 ohm parallel or 16 ohm series depending on which jack I plug into.

    If you are wary about the integrity of the switching jacks, you can use a heavy-duty DPDT toggle switch in one of the holes with a Switchcraft jack in the other. Let me know if you want a diagram of this setup.

    Cheers,
    Ken
     
  5. teefus

    teefus Supporting Member

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    a series box is an fx sized box with three jacks, all wired in series. you plug your amp output into one, speaker cab 1 in to the next jack and speaker cab 2 in to the last jack. instant series. if you do this, use the plastic marshall jacks with a metal box or the metal jacks with a plastic box.
     
  6. SteveStrat

    SteveStrat Member

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    Ken,

    It's the DPDT switch that I need. I think I can wire it up right, thanks for the diagram though. I can't find anywhere online that sells the switch that will take the wattage.

    Steve
     
  7. SteveStrat

    SteveStrat Member

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    "I put a dual jack plate in my 2x12. I can get 4 ohm parallel or 16 ohm series depending on which jack I plug into."

    Is it just that easy? For some reason I always thought you had to jumper the (-) and (+) together away from the jack and not at the jack. Am I having a brain fart?

    Steve
     

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