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View Full Version : Building a box using 1/2" MDF? 1000+ watts



alex5857
08-21-2008, 02:13 AM
I stumbled across some free 1/2" mdf, im looking to build a box for a RE SX which will get around 1300 watts.

Now, i know the 1/2" alone wont be enough, if i re-enforce the inside with some bondo or maybe even some fiberglass would i be good?

and double-ing up all around is not a option.

kmanian
08-21-2008, 02:14 AM
I would say if yes but the inside would look like swiss cheese. bracing everywhere!

Why can't you double it up?

twisztdauthorit
08-21-2008, 02:15 AM
maybe not double up but create alot of braces and maybe double baffle the top?.


cut up 2" strips and line the inside box with em?

kmanian
08-21-2008, 02:16 AM
my other statement would be unclinch you butt cheeks and take $25 to home depot and get a sheet of 3/4. If your going to take the time to build a box, do it right! or is that *** to tight?

alex5857
08-21-2008, 02:17 AM
i dont have any room, my trunk is completely taken already.

i wouldent mind the inside looking like crap, noone would ever see it regardless

alex5857
08-21-2008, 02:20 AM
my other statement would be unclinch you butt cheeks and take $25 to home depot and get a sheet of 3/4. If your going to take the time to build a box, do it right! or is that *** to tight?

well, i have it in 2.0cubic feet as is, i would just like to add a little room, i would only do it if it didn't require any extra money.

kmanian
08-21-2008, 02:22 AM
the problem with 1/2 mdf is you will have a really hard time screwing the boards together without splitting them. even with glue your surface area is 50% smaller than with 3/4. you can do it, but I would just get some 3/4 mdf or birch.

kmanian
08-21-2008, 02:24 AM
well, i have it in 2.0cubic feet as is, i would just like to add a little room, i would only do it if it didn't require any extra money.

you need to really think about what your doing if $25 for mdf is goin gto break you. car audio can be had for a bargin, but less than a $25 budget for a box?:wow:

kmanian
08-21-2008, 02:25 AM
by the way, I am sorry if I have the jack *** attitude.

Good luck, and give it a try, it may work out.

alex5857
08-21-2008, 02:29 AM
you need to really think about what your doing if $25 for mdf is goin gto break you. car audio can be had for a bargin, but less than a $25 budget for a box?:wow:

It definitley wont break me, i just dont NEED it and i dont WANT to spend any money. i have a well built box already, just seeing if i could improve on it using 1/2" MDF re-enforced with some fiberglass

Lakota
08-21-2008, 03:07 AM
1/2" is really flimsy.

kberkel
08-21-2008, 03:31 AM
always use wood when you can, especially since glass has very little strength in flat areas. filler won't do **** for strength

save your fiberglass for another project, and buy 3/4" mdf.

miker
08-21-2008, 12:11 PM
the problem with 1/2 mdf is you will have a really hard time screwing the boards together without splitting them. even with glue your surface area is 50% smaller than with 3/4. you can do it, but I would just get some 3/4 mdf or birch.

maybe he just won't screw it then. ;)


I'd say go for it, and do a good job bracing.

helotaxi
08-21-2008, 12:24 PM
You'd be really hard pressed to brace it enough to keep it from flexing badly. By the time you added that much bracing, you'd end up with more in materials than that sheet of 3/4" would have cost and the bracing would displaced more that the extra thickness of material. 1/2" is a waste of time for a sub that's going to see any real power.

Senco
08-21-2008, 12:39 PM
you wont be happy with the end result.