forgot to brace top of box need help securing it - Car Audio Classifieds!
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  #1  
Old 05-05-2012, 11:26 AM
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Default forgot to brace top of box need help securing it

the top part of my box is jumping like crazy from pressure didnt brace the top.

description of problem and details:

i only braced the front and back with a metal rod and forgot to brace the top with one as well and only the 2 sides, port wall and front and back are holding it on with mdf screws and wood glue

possible solution:

i was thinking of installing two metal L brackets on the sides and then connecting a metal like 1inch peice across the top of the wood from side to side screwing into the top L brackets for support..


not sure it it would work but if anyone else has input i want to make my box last me at least another few months before i build another out of birch that would be sweet.

Last edited by darkkon; 05-05-2012 at 11:29 AM.
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Old 05-05-2012, 11:27 AM
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pics?
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Old 05-05-2012, 11:29 AM
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it will just rattle against your metal brackets. you need to find another way.

post PICTURES so we understand what you are talking about.
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Old 05-05-2012, 11:35 AM
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Default pics

this is the front of my box in the first pic that has the metal rod securing it,

the second and third pics are the back side of my trunk looking inwards the top part bounces like crazy, it needs support like a metal rod.

the only problem is i cant take my box out (well i could but i dont want to bc i just expandafoamed yesterday and sealed it in then realized it HA ironic. )

if i place my hand on the top part of my box i feel the wood flexing like CRAZY like quarter inch lol but i know its still sealed on there and not going anywhere, i just know i can gain a few debeez by making it flex less.

equipment: 2 xxx soundstream 15s w old style tc sounds recones
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Last edited by darkkon; 05-05-2012 at 11:39 AM.
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Old 05-05-2012, 11:46 AM
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Pull the box out, try some L brackets or wood 45's in the corners for mechanical/solid stiffness, then give the whole inside of a the box a hefty coating of some fiberglass resin (mostly on the top that's flexing). If that doesn't help, pile on some fiberglass mat and more resin until you get achieve your desired stiffness.

Don't hesitate to resin the outside of the box, too!
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Old 05-05-2012, 11:48 AM
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im NOT trying to pull the box out, i just sealed it in yesterday. lol but its mostly in the middle where the problem of flexing is, not the sides. i could fiberglass resin the top? but i dont know how much strength that would add from the outside of the box.
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Old 05-05-2012, 11:53 AM
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build the box properly next time, top to bottom 2X2 would have solved issue with ease


the front to back rod isnt even centered so thats not ideal either. next time buy an 8ft piece of 2X2 for less than $3
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Old 05-05-2012, 12:00 PM
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the rod is centered, maybe not in the middle of the box, but it is centered front to back where i had room to put it between the woofers. the top is the problem not front and back. lol

and yes i realize a brace on the inside would have solved it all but i was tight on space so i decided to use a metal rod but thought the port wall would be enough strength for it, obviously not.
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Old 05-05-2012, 12:03 PM
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Screw some 2x4 on top of the box from front to back spaced about 6" apart.
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Old 05-05-2012, 12:04 PM
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Quote:
Originally Posted by darkkon View Post
the rod is centered, maybe not in the middle of the box, but it is centered front to back where i had room to put it between the woofers. the top is the problem not front and back. lol

and yes i realize a brace on the inside would have solved it all but i was tight on space so i decided to use a metal rod but thought the port wall would be enough strength for it, obviously not.
Just get a wooden dowel and run it top to bottom. Wood glue on each end and time to dry should do it.
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