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View Full Version : Do I need bracing for this box?



Bass911
06-29-2010, 04:32 PM
This pic is not accurate, just something I drew up. The box might be deeper than it looks on the drawing. I know the ports serve as bracing, but I'm thinking I need a wooden dowel somewhere between the 15's? The subs weigh 30lbs a piece and will be downfired. The box height is about 15.1875". The double baffle on the front is to flush mount .75" plexi window. The amp is a Brutus BXi2607d if that helps? Do I need more bracing?

http://i425.photobucket.com/albums/pp337/jirving88/100_1052.jpg

http://i425.photobucket.com/albums/pp337/jirving88/100_1040.jpg

k_schutte
06-29-2010, 04:33 PM
I would brace between the subs myself...

basscort2009
06-29-2010, 04:36 PM
yes u need bracing. anything over 1 or 2 small 12s i would brace. dont know why people have to ask really. should just come natural to brace a box

bhsdriller
06-29-2010, 04:37 PM
the back wall is pretty long, I'd brace it

goingdef
06-29-2010, 04:41 PM
For sure the size of that box requires it or it will suffer from panel flex real bad like hopping around the car bad, just use the left over mdf you have to make some bracing for the largest panels of the enclosure. By adding a brace to the largest panel on center will reduce it's flex you won't need a ton of bracing but some would be better then none in an enclosure of that size with 2x15"s

RAM_Designs
06-29-2010, 04:47 PM
I'd brace every panel you possibly can, so basically everything but the left and right sides. Definitely the back and the two interior port wall, as well as a brace from top to bottom in the middle of the box...the double baffle up front might be ok.

Bass911
06-29-2010, 06:10 PM
Thanks everyone. So how does 2 wooden dowels spaced out in the middle from top to bottom sound? What's the best way to brace the back wall, maybe small triangular braces spaced out? I don't want to lose much air space.

on1wheel01
06-29-2010, 06:52 PM
Yes god yes. Either all thread, or get 1" or bigger oak wooden dowels, or mdf made bracing. It's not that dowels affect sound, they take up such little space it shouldn't matter. I did dowel bracing in a box like this, I added more but I didnt take a pic after adding more in.

http://i79.photobucket.com/albums/j160/grnreaper01/f241d7e1.jpg

basscort2009
06-29-2010, 07:38 PM
i have 5 1/2 inch all thread runs and a 2x4 for bracing. u can never be too sure

http://i65.photobucket.com/albums/h236/basketball3rulz/heaths%20new%20build/100_1085.jpg

Bass911
06-29-2010, 08:10 PM
I want to do the metal, but might just do the dowels because the metal rod sticking outside the box will probably kill the look of the vinyl that I'm covering it with.

on1wheel01
07-03-2010, 11:58 AM
i have 5 1/2 inch all thread runs and a 2x4 for bracing. u can never be too sure

http://i65.photobucket.com/albums/h236/basketball3rulz/heaths%20new%20build/100_1085.jpg

man that looks like poo. But I bet is killer loud. Yea dowels are nice for a clean look. But all thread is the best . I use either depending on customer request. For the latest install with dowels the customer wanted a clean look so went that route.

http://i79.photobucket.com/albums/j160/grnreaper01/0b495c15.jpg