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Old 19th December 2005, 02:29 AM   #1
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Default Do I need to brace?

Would you guys recomend bracing a box thats 3 cubes sealed? I'd rather not, but.. if I got to. Its deminsions are 21.5x17.5
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Old 19th December 2005, 09:29 AM   #2
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With a length like that -yes. Sorry. You could get away without it, but vibration could become a problem. If you're worried about fancy techniques, just use some 3/4" or 1" dowel-rod cut to the appropriate size. Should do the job.

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Old 19th December 2005, 10:21 AM   #3
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I agree, vibrations could be a big problem depending on the woofer you use. What I usually do, since I hate bracing, is make one additional front panel (assuming your front is inset) and cut an identical hole in the middle as you did for the real front, then just put it in the middle of the box. As long as you are working with the table saw anyway its no big deal. The real problem comes when you don't have enough wood on the one sheet for it and you have to go buy a whole new sheet...

Although, I found one site saying you don't need to add bracing for boxes under 5 cubes (which I personally disagree with):

- Ron
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Old 19th December 2005, 11:49 AM   #4
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Good technique. Can't say I agree with that link either. Mind you -with a few exceptions, I can't say I ever really associate car-audio with 'high-end' anyway.
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Old 19th December 2005, 02:49 PM   #5
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Depends on materials too. Stuff that size I never braced, but I also used 1" MDF. But that's just crazy ol' me
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