Fiberglass or wood?

Discussion in 'Home Theater Projects' started by neal p, Sep 12, 2003.

  1. neal p

    neal p Auditioning

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    How much better and lighter is fiberglass than wood? I am planning on makeing a fiberglass cabinet to hold my audio adire 281 kit speakers... Im also gona put a shiva 12" sub at the bottom of the cabinet with a Adire Audio AVA250 amp...Its gona be about 6 feet tall...the 281 speakers and the sub will be in different cabinets but molded into one out of fiberglass... I would like to just power the 281 speakers off an regular receiver but im not sure how i can get both subs to plug in the receiver because thier is only 1 sub output on most receiver's... If anybody has any better ideas or dosnt think this will work at all let me know.
     
  2. Darren_T

    Darren_T Second Unit

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    Better? Probably not but maybe if done right.

    Lighter? Why would you want it lighter? A heavier speaker is going to be less resonant if built right, weight tends to work in your favor.
     
  3. Jake K

    Jake K Stunt Coordinator

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  4. RichardHOS

    RichardHOS Second Unit

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    My hunch is that fiberglass of the same thickness would be comparable to or even superior to wood. Increased uniformity, comparable stiffness to hardwoods, and hysteresis damping and mass density comparable to MDF (all roughly, of course).

    The ability to form complex geometric shapes would give a clear advantage in geometric structural stiffness, not to mention potential baffle shapes.

    Not that it doesn't come with its own set of problems, of course. [​IMG]
     
  5. neal p

    neal p Auditioning

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    thx guys helped out alot... This project wont start off for a while still but i have good idea on what i want and how it would work... [​IMG] Im gona use these speakers in my apartment next year and need something good for the parties!
     
  6. TimForman

    TimForman Supporting Actor

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    Out of curiousity, why are you wondering? Do you have easy and/or inexpensive access to materials? Going for a particular look?
     
  7. Shawn Solar

    Shawn Solar Supporting Actor

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    Most car guys recommend 1/4" fiber for sub enclosures. It is lighter and when layered properly you can jump up and down on it and not break it. But there are exceptions. fiber glass gets its strength when made into curves and designs but loses ridgity when made straight. If you plan on making straight panels with no curves use MDF. For curves using 7-9 layers of mat and laying each layer 90 degrees from the last will make a very strong box.

    Fiberglass is not hard to form but extremely time consuming to finish. Lots and lots of sanding[​IMG]
     
  8. neal p

    neal p Auditioning

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    Mostly for look and because no one will have something like this... Im not that great at wood work and i feel that im stronger with fiberglass and it might help get some more bass out of the speakers... Shawn both cabinets will have supporters(chambers) in them so the air can move around them in both the sub box and 281 cabinet. I would like to get about 10 layers just to make sure nothing happends to them if they tipped over or get knocked down... the 281 speakers will be vented so thier gona be about 48h x 14d x 9w and will have three dividers in them what i hope help support them. Define your curves in the fiberglass im not sure how much distortion i can put in the box than keeping it a rectangle or it will not work properly and not sound clear...Im just gona take wooden stakes clue them together put some fleese over it and start fiberglassing both cabinets frames then when thats done set the 281 cabnet on top of the sub cabinet and mold them together with some more fiberglass and some cool patterns... If anyone has a better setup with putting 2 8's and tweeter(kit 281) and a 12'inch sub that needs about 2.5 or 3 cf all in one cabinet let me know..!
     

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