Box design ????

Discussion in 'Home Theater Projects' started by Cam McFarland, May 23, 2004.

  1. Cam McFarland

    Cam McFarland Supporting Actor

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    I did a search & got tired of going through the about
    78 pages of results, so I hope this question does not
    offend anybody.

    How does one go about finding the enclosure size needed
    for any given sub.

    In a cars motor, a liter is the equivelent to ~61 cu.in.

    It may be a stupid question, but is it the same on an enclosure?


    TIA,

    - Cam
     
  2. Wayne Ernst

    Wayne Ernst Cinematographer

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    Adire Audio has provided some great plans and box sizes for their Shiva and Tempest drivers. This might be a great starting point for you as there is also a good bit of information with the plans on what kind of performance you could expect fromt the various box sizes.
     
  3. Cam McFarland

    Cam McFarland Supporting Actor

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    Thanks Wayne, I already downloaded those sometime
    last week.

    I was wanting to find out how to figure the size required
    for a sub for my truck if I dont use the Shiva.

    Besides, I may as well be reading Greek as far as
    the specs go......... [​IMG]
     
  4. Wayne Ernst

    Wayne Ernst Cinematographer

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    Cam,

    You might want to post the question over in the auto sound section of this forum, too. Members like Scott L, whould be able to provide some of the answers you are looking for.
     
  5. Cam McFarland

    Cam McFarland Supporting Actor

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    I have done that, but I also am trying to figure out
    box size for undetermined (as of yet) sub for HT.
     
  6. minhG

    minhG Stunt Coordinator

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    Cam,

    Easiest way is to first pick your sub and then try to figure out enclosure size. Many of the online subwoofer vendors will gladly give you help with enclosure sizes for their drivers.


    If you want to be more self sufficient you can download software and do the calculations yourself. There are a number of key values you need for the driver to input into these programs, but most vendors now list those on their sites. Just do a google search to find out how to use the software.


    If you're pretty new, I'd recommend Adire again, because they're very supportive of the DIY community. Another company I like is Elemental Designs (edesignaudio.com). They give basic box dimensions on their site too but most of their drivers are on backorder right now.
     
  7. Cam McFarland

    Cam McFarland Supporting Actor

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    Thanks Minh,

    Now point me in the direction to find the software....[​IMG]

    Also, some of the manufacturers list a range for their
    subs enclosures....ie: .4l-.6l, whats up with that?
     
  8. minhG

    minhG Stunt Coordinator

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    Cam,

    You need to practice your web searching skills [​IMG]

    http://www.linearteam.dk/

    i think that's the software that most people use, probably because it's free. there's another one out there that's commercial, i think partsexpress sells it too.


    Vendors list box size ranges, because you want different sizes for difference tunings. For my Shiva, Adire provides an 85L, 95L and 142.5L diagrams, you could actually make a box (almost) any size you want and tune the port to match. It's a trade-off between box size, available power, etc.

    I've built two subwoofer boxes, my 142.5L shiva and a .4cf one for my Elemental Designs E8A. The E8A was a sealed box, so it's much more forgiving wrt to box volume. The shiva is a vented one, so you have to be much more careful otherwise the tuning will change--which may be good or bad. I did some research on calculating box volume etc, but it was too much a hassle for me. Both the boxes I built were from designs by the manufacturer.

    good luck.
     

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