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Old 8th April 2008, 10:02 PM   #1
NED 209 is offline NED 209  Ireland
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Default lightweight wood for cabinet?

hi all, in the throes of a project here, building a boombox for portable use.

was gonna use a sandwich material called gatorfoam, but i got the speakers today, and i fear it just wont be strong enough.
the speakers are coaxial beyma 8bx, theyre heavier than i anticipated, and the hf driver mounted on the rear means theyre centre of gravity is very far back, so there'll be a lot of strain on the baffle. (< i think i got that right? - the surface theyre mounted on)

so i guess my question is, are there any lightweight woods i could look at?
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Old 8th April 2008, 10:54 PM   #2
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http://www.paulowniawood.com/

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Old 9th April 2008, 02:03 AM   #3
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There are plywoods that are very strong for their weight. Add some bracing where needed, and I can't imagine anything lighter for the money (or easier to work with). Try your average 1/4 inch stuff at the local home improvement center. Not (ahem) hi-fi, but light. You wanted light, right?
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Old 9th April 2008, 02:26 AM   #4
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You should add a magnet support to minimize stress on the baffle.

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Old 9th April 2008, 02:42 AM   #5
NED 209 is offline NED 209  Ireland
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thanks for the replys. yeah i have some 1/4 inch plywood here. im hardcore tempted to use it. wood is such a nice material to work with. i just blew 100 euro on gatorboard... maybe i can use it for bracing.
Planet 10 do you have a photo of what you mean, i constructed something like that before but it was a lil dubious
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Old 9th April 2008, 03:10 AM   #6
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Quote:
Originally posted by NED 209
do you have a photo of what you mean
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Old 13th April 2008, 06:40 AM   #7
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Are you going to use T-nuts to mount the driver?? if so perhaps a single layer of woven glass fibre and thinned resin would give it some strength
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Old 13th April 2008, 06:57 AM   #8
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Default Prestress... the cabinet walls

concave or convex. If you force a dish into the walls they will be a lot stiffer.
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Old 13th April 2008, 06:57 AM   #9
dangus is offline dangus  Canada
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Curved 1/4" plywood would be much stiffer than a flat sheet. Or, consider Sonotube (or the equivalent), which is basically a big cardboard tube, but is strong enough to withstand the pressure of a column of wet concrete.
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