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Hey whats up guys, Im redoing my trunk this summer so it looks good instead of a "brilliantly designed bomb" as someone on here said my trunk looks like now lol. Anyways I read through the DIY on fiberglassing your sub enclosure and I was unsure about one thing... Do you build a box behind the fiberglass out of wood or does the FG become your "box" so to say. Thanks guys for any help.

BTW Im gonna be running 2 12" Infinity Subs, and JL audio amp maybe...depends on money situation.

 
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if you decide to fiberglass you don't need to build anything from mdf. the box is completely out of fiberglass

 
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It would be smart to build a wood frame. Then staple grill cloth to the frame put resin on the grill cloth then fiberglass ontop of the grill cloth. That is the way that I have always done it. Make the wood frame a little smaller than the dimensions that you want the box that a way you have room for the resin and fg to build up and the finished product is the exact size that you want it.

 
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^^^^^What he said.

 
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Sweet thanks guys

 
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I prefer to stratch fleece for my first layer, but grille cloth works as well. Either will work fine. I like fleece because it provides a thick base to build up on. And pour the resin on instead of brushing it on. Grille cloth, imo, is a little too britle, especially when you stretch it to a certain point. Either will work fine though. I'd also like to echo the sentiment to build a wood skeleton to glass to. You can always remove it later, or leave it in there. Either will work fine.

 
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any surface you want flat, you'll definitely want to use wood. and I would definitely use wood for your baffle (speaker rings). I dont like grille cloth because its expensive. I'll use it for its intended purpose, when I can't use the cheapest stretchy cloth the fabric store has to offer!

make sure it stretches in both directions. like a T-shirt.

 
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i am building mine now lol. i used an old bed sheet and built a mdf frama nd stapled the bed sheet to that. then resind that. it worked fine.. and its solid

i'm in the bondo smoothing work now. and need to rebuild my baffles

 
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How long has it taken you to do your set up so far, and how much of the materials do you guys think im gonna need to cover half of my trunk?

 
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lets see a pic of how it is right now so we get a reference

 
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Oh, and when buying fabric, check the remnant bin. You can get it for 1/3 to 1/2 price. Another option is to use old t-shirts, or buy some t-shirt material, as it's the perfect stretchyness (I made that word up).

 
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http://web.njit.edu/~cas1383/proj/main/

This has to be the best site for glass'n. Shows you most everything you need to do.

-Frank

 
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Go to Walmat and buy 3 yards of fleece for like 3 cents (eggageration). Grille cloth is big money and you get about the same result. I definitely second the motion to use wood on your flat surfaces.

 
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That site is ok for basics, but certainly don't follow his bad example of how to Aim your kicks. IMO the kicks built there came out like *** but it was a noble effort and good information nonetheless.

Quote from site:
As far as proper aiming, I simply used a laser pointer and aimed the center of the tweeter at a spot on the opposing window; repeated for both sides. For the woofer I simply had it fire straight across

And that's why you threw the kick panels away afterward and wasted your time making them . . . That's not how you aim kicks.