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Old 7th March 2002, 12:05 AM   #1
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Question lightweight enclosure materials

Are there any lightweight speaker enclosure materials that give satisfactory results? I'm building a portable system,and have 6x9 speakers that I want to incorporate.I want to make them as small and light as possible,while still sounding good. Impossible? Please tell me.
John
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Old 7th March 2002, 01:41 AM   #2
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The best lightweight materials are aerolam and fibrelam, as used by the aircraft industry.(and Celestion in the SL600 and 6000
series). Very expensive and difficult to work with, but very stiff and light.
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Old 7th March 2002, 02:13 AM   #3
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Thanks,Andrew.Those look very interesting,though made of unobtanium.Makes me think of a Lexan product,I think called Twinwall.Two layers with ribbing in between.I don't know if it comes in different weights.
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Old 7th March 2002, 02:14 AM   #4
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How about fiberglass, it's light, stiff resonably priced. And you can make it any shape. You'll need a wood ring to screw the speaker into though.
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Old 7th March 2002, 03:56 AM   #5
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I would use a 10" PVC pipe, rip in half, use a3/4" or 1" MDF baffle...rabbet the edges so the PVC fits onto a lip, and cut a top and bottom out of MDF also. Their you have it, a very strong, and relatively light enclosure.

Only problem is the cost of the PVC. I think that 10" is only available in 8 or 10 foot sections? You could get lucky..call the local plumbing supply and see if they have some scrap.

Just an idea.

-Chris
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Old 7th March 2002, 08:43 AM   #6
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3/8" or 1/2" baltic birch ply -- strategically braced or curved (use 2 or 3 layers of 1/8") -- an inexpensive, easy to make, & light enclosure.

dave
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Old 7th March 2002, 05:14 PM   #7
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Chris and Dave-any chance of getting sketches of your design ideas? I can't quite picture what you mean. Thanks,
John
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Old 7th March 2002, 05:45 PM   #8
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Somebudda stop me!! How 'bout sonotube? I know people make telescope tubes out of it,though I'll have to check on how they finish it to make it stiffer and weather-resistant(I also have a piece of 10 inch in my garage,so I want it to work.)
Seriously,I love brainstorming,and appreciate the responses.Fiberglass brings back unpleasant memories of long-ago auto body repair attempts.But please,keep 'em coming.
John
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Old 7th March 2002, 06:19 PM   #9
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Quote:
Originally posted by jbrom
Dave-any chance of getting sketches of your design ideas? I can't quite picture what you mean.
I didn't really have a box shape in mind -- just a construction method. Your box sounds like it is going to be fairly small so a rectangular box with 35mm strip braces (running the long dimension -- ie dividing panels into long skinny areas -- even better if they are at an angle dividing the panelsinto trapezoids).

By stressing the panels into a curve, even a slight one, the bracing could be left out -- a harder box to make, but lighter.

dave
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Old 7th March 2002, 06:53 PM   #10
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Quote:
Originally posted by jbrom
How 'bout sonotube?
Sonotube works well -- as soon as you cut it lengthwise you have to be careful to rigidly mount the cut edges to give it back its strength. The DCM Time Windows used this to good effect.

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