Magnet size on Woofers

Discussion in 'Archived Threads 2001-2004' started by Sebastian, Sep 25, 2002.

  1. Sebastian

    Sebastian Second Unit

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    What is the benifits of a bigger magnet on the exact same woofer?
    Does just handle more power?
     
  2. Dustin B

    Dustin B Producer

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    The magnets themselves have little to do with power handling. They generate the magnetic field that opposes the field generated in the voice coil to cause the motion. The voice coil and its' cooling determine power handling.

    So the bigger and longer the stack, the more force over the longer distance can be applied. But there is a lot more to it than that. There are tricks and math formulas way over my head that shape these fields to get the best performance out of the driver.
     
  3. Sebastian

    Sebastian Second Unit

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    So if a sub manufacturer states that they have improved there driver by making the magnet bigger. say 30oz to 50oz and kept everything else the same what would it do to the overall output of the sub and freq response, if any?
     
  4. Dustin B

    Dustin B Producer

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    I'm not sure. I don't know how changing the magnet affects all the other parameters. But I am quite confident that you can't just up the magnet size, leave everything else the same, and expect improved performance.
     
  5. Jack_P

    Jack_P Extra

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    Wouldnt a larger magnet increase the BL and lower the qes?
     
  6. TTBOMK, Jack is correct
     
  7. Tom Brennan

    Tom Brennan Screenwriter

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    Sebastion---With the magnet larger and everything else the same the speaker efficiency will go up but the speaker won't go as deep. Tradeoffs.
    www.chicagohornspeakerclub.org
     
  8. Greg_R

    Greg_R Screenwriter

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    I would be wary of a manufacturer touting a magnet of 30oz vs. 50oz. If they said things about BL (or other Theile-Small parameters) then I'd take them a bit more seriously.
     
  9. Isaac C

    Isaac C Stunt Coordinator

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    There's no point in increasing magnet size after you reach the plate/poles' saturation point. The pole/plate can only accept so much magnetic field. So the law of diminishing returns still applies here [​IMG]
    Isaac
     
  10. Brett DiMichele

    Brett DiMichele Producer

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    Okay so let me get this straight.. Say I take a Scan-Speak
    5.25" Revelator and I remove the magnet assembly and go down
    to Disney and take a pice of thier Mag-Lev track and affix
    it to the back of the Revelator and feed it 1500 or so watts
    it won't play down to 2Hz and lay waste to everything in a
    50 square mile radius? *snaps fingers* Shoot! Well there
    goes my plans for the "Subwoofinator".... [​IMG]
     

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