Do I need to brace?

AutoAudio · 19th December 2005, 02:29 AM

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

Scottmoose · 19th December 2005, 09:29 AM

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.

Scott

ron.eddy · 19th December 2005, 10:21 AM

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):

http://www.termpro.com/articles/buildbox.html

- Ron

Scottmoose · 19th December 2005, 11:49 AM

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.

Geek · 19th December 2005, 02:49 PM

Depends on materials too. Stuff that size I never braced, but I also used 1" MDF. But that's just crazy ol' me

19th December 2005, 02:29 AM	#1
AutoAudio diyAudio Member Join Date: Nov 2005 Location: Boston	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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19th December 2005, 09:29 AM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	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. Scott

19th December 2005, 10:21 AM	#3
ron.eddy diyAudio Member Join Date: Nov 2005 Location: Iron Range - Minnesota, USA	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): http://www.termpro.com/articles/buildbox.html - Ron

19th December 2005, 11:49 AM	#4
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	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.

19th December 2005, 02:49 PM	#5
Geek diyAudio Member Join Date: Sep 2004	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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