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Old 06-29-2003, 18:55   #1 (permalink)
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Fibreglass sub box.

I am going to build a sub box for my EA out of MDF to sit in the back right corner of the boot (behind the tail light area), to allow me almost full boot space, after designing the box, I think I have it worked out will cost about 30 bucks all up uncarpeted at the most.

Now fiberglass would allow me more design freedom considering where I want to put it, how hard is to make a fiberglass box, and how much is it likely to cost, the last fiberglass I ever did was when I was 15 on a surfboard, so any comments or suggestions would be greatly appreciated.

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Old 06-29-2003, 20:41   #2 (permalink)
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Re: Fibreglass sub box.

it shouldnt cost to much to use FG. Don't buy it from a hardware store, get it from somwhere like a boat shop, crash reparer, surfboard manufactures and the like.

I would make an MDF/FG composite box.

Line the back of the light area and the inside of the right rear quater panel, and the floor etc.

Make a mould of this area in FG mat. Let dry now build most of the box in mdf but leave the back (side that will back onto light/quater panel). Join the FG mould and the MDF 1/2 box. Join them with more FG + plenty of ressin.
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Old 06-29-2003, 20:48   #3 (permalink)
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Re: Fibreglass sub box.

If I am going to line it, how do I stop it from sticking to it, so it can be removed, I may just need to replace a bulb you know :0)

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Old 06-29-2003, 21:04   #4 (permalink)
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Try using aluminium foil to stop it from sticking to your boot
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Old 06-29-2003, 21:09   #5 (permalink)
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Re: Fibreglass sub box.

How thick should I be layering the fiberglass to make it strong enough to be free standing, but not so heavy once I make the box composite you will need a crane to pick it up :0).

I figure the bottom, left side, front, and top, will be 12mm MDF, the back (tail light) and right (fender side) will be fiberglass.

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Old 06-29-2003, 21:11   #6 (permalink)
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Re: Fibreglass sub box.

Does any one have a link to fiberglass for beginners, I will be doing my own search on the web, or I guess the local library, and input welcome.

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Old 06-29-2003, 21:45   #7 (permalink)
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Re: Fibreglass sub box.

yeah use alfoil to stop the FG sticking to the car. Once the FG has cured remove the FG mould...hey presto.

As for how thick, i would say 4layers of FG mat. Also 12mm MDF really isnt sufficent for a sub box, use 16 or 18mm preferably.

as for FGing, check out www.caraudioaustralia.com in their tutorials section, i think we some gear on that.

BTW, what sort of sub is this for, how big are you making the box, ported or sealed, and what are you powering it with?
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Old 06-29-2003, 21:51   #8 (permalink)
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Re: Fibreglass sub box.

I was also had a thought, I could use expanding foam to create moulds of the tricky parts, if I covered the parts with foil as mentioned then it wouldnt stick to them, and would make it easier to mould on top and at least allow me to do it out of the car, and be able to leave it to cure properly.

Well if I go fibreglass composite, then I will go 18mm as I will have more volume to play, 12mm was because of space restrictions and trying to keep volume to a reasonable size.

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Old 06-30-2003, 18:17   #9 (permalink)
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Remember to take lots of pics for us all. Post them on here, or even just send to different people.

I would definately be interested in seeing the end product and the process of making it.

My email, Powers_austinpowers@hotmail.com

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Old 06-30-2003, 18:40   #10 (permalink)
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Re: Fibreglass sub box.

I intend to, got to make better use of the digital video cam, with both video and pics, I will not be starting this for a few weeks, need to get paid first, but will post the results for sure, look out for a new thread "FibreGlass Sub Box Making 101" in the near future.

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