Stupid Isobaric Subwoofer Question.

Discussion in 'Home Theater Projects' started by Stephen Weller, Feb 5, 2004.

  1. Stephen Weller

    Stephen Weller Stunt Coordinator

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    I'm leaning heavily toward a DIY isobaric sonotube design, to maximize the WAF. Then I had this thought (Uh-oh!):

    If two clamshelled drivers effectively halves the cabinet volume, would two clamshell assemblies (wired appropriately) effectively quarter the cabinet volume?

    Just thinking outside the "box." [​IMG]
     
  2. Seth_L

    Seth_L Screenwriter

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    Yes it would, but they're hard to couple.
     
  3. Stephen Weller

    Stephen Weller Stunt Coordinator

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    You mean acoustically. Right?

    It could make for some fun experimentation anyway.[​IMG]
     
  4. Seth_L

    Seth_L Screenwriter

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    Right, it's hard to couple the two clamshells together.
     
  5. Bryan Michael

    Bryan Michael Supporting Actor

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    what about the design of the b4 by svs that is allmost the same as a push pull
     
  6. Stephen Weller

    Stephen Weller Stunt Coordinator

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    Oh, no. That's not what I thought you meant.

    *I* meant one clamshell assembly at one end of a sonotube, and another clamshell assembly at the other end of the tube. Wired correctly, all four drivers will push-pull in unison. Follow?

    And will it really quarter the required cabinet size?
     
  7. Stephen Weller

    Stephen Weller Stunt Coordinator

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    It's very pretty. But I'm looking for invisible.[​IMG]

    And is it isobarically coupled?
     
  8. Dustin B

    Dustin B Producer

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    A clamshell assembly at either end of the sonotube wired to operate as a dipole is what you've suggested.

    The two clamshell assembles in this config won't quarter the volume requirement. Each one by it self will half the requirement of volume, but only be capable of the output of a single driver in an enclosure twice as big.

    Putting them in the same enclosure on either end will double the volume requirements and double the Vd. But as soon as you wire them like a dipole you'll end up with major bass cancellation issues.
     
  9. Seth_L

    Seth_L Screenwriter

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    I'm pretty sure the B4+ is just 4 drivers in a box.
     
  10. Stephen Weller

    Stephen Weller Stunt Coordinator

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    BINGO! The light just went on. It's a dipole. Never
    mind.

    But thanks!
     

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