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View Full Version : First Fiberglass build!!



carfreak5312
01-21-2008, 09:01 PM
Some pics of my first build. learned everything on CA.com. COMMENT!!

thanx!!

there is dust all over it.
will be finished soon.

jdc753
01-21-2008, 09:03 PM
Lookin pretty good, some filler and a lot of sanding and you should be in REALLY good shape. Whats the volume and tuning? and what subs are you putting in there? I'm guessing its going in a chevy cause of the bowtie right above the port.

amedeuce
01-21-2008, 09:05 PM
port looks small?

it does.
What's going in it?
The glass looks a little thin also.
Check out this place.....

http://www.fiberglassforums.com/

carfreak5312
01-21-2008, 09:34 PM
this was kinda a low budget build. i had about 560$ to do everything. ive ordered 4 ma audio ma12d4's. 400 rms 800 peak. still need to buy an amp. The box is going in a chevy blazer. (Fits Snug, very snug)lol. i dont really know much about port sizes and all that stuff. im more into the electrical side of it. i read on another thread that a basic rule of thumb is to push on the fiberglass, wherever it bends of flexes at all, it needs more glass. still need to add more.

Freelander
01-22-2008, 12:20 AM
Push on it? With a properly built box you should be able to stand and jump on it.

big_mofo
01-22-2008, 12:49 AM
so you just made a port???? you have no idea at what the tuning is??

IDSkoT
01-22-2008, 01:11 AM
so you just made a port???? you have no idea at what the tuning is??

QFE

A box that isn't properly tuned is USELESS

:wow:



:crap:


Might as well close off the port and make it sealed.

DarkFox
01-22-2008, 01:59 AM
I dont know much about the glassing, but that port looks REALLY small compared to the airspace in the box. I would say seal it off and stuff the box with some polyfill.

carfreak5312
01-22-2008, 02:38 PM
ill just close it off prolly. (port). keep in mind that all i did was glass it

carfreak5312
01-22-2008, 02:42 PM
i can make the port to the right size, but like i said before, im more into the electrical aspect of the whole deal. can someone help me with the tuning. isn't it hard to do with all of the curves.

tRidiot
01-22-2008, 02:45 PM
You'll need to find the (relatively) exact airspace, which shouldn't be TOO awful hard. Then you can calculate the port tuning and adjust from there.

I'd say with all the effort and cost put into that box, you really REALLY should make the effort to tune it properly, or you will likely be very disappointed with the sound at the end of the day. If it's just about looks, well, then seal it up and call it good, but if you want it to SOUND decent, get to work and determine the actual airspace inside you're working with, then we can help you with the port tuning.

audioarsonal
01-22-2008, 02:46 PM
You need more FG!!!It should be about 3/8 to 1/2in thick if not more.Maybe try a layer of kitty hair.

carfreak5312
01-22-2008, 02:55 PM
..

carfreak5312
01-22-2008, 03:52 PM
ok. the volume of the box is 7.901 ft^3. i think i did everything right. does this sound totaly wrong or????

carfreak5312
01-22-2008, 03:54 PM
You need more FG!!!It should be about 3/8 to 1/2in thick if not more.Maybe try a layer of kitty hair.

thx, ill add some when i get the chance.

tRidiot
01-22-2008, 04:01 PM
I dunno if the volume is right, that depends on the subs.... sounds prolly close, around 1.75 cubes for each sub.

But that port... how big is it in area and volume?

audioarsonal
01-22-2008, 05:04 PM
If its to thin it will sound "pingy".You want it to be as solid as possible.A box that size I would use probably 2-2 1/2 gal. resin and probably 3 or 4 packs of glass mat.

audiobahnuser18
01-22-2008, 05:15 PM
Ok man you need more glass on it glass look's to thin. Once you sand it down you will be getting holes if it is to thin . I recomend use some duraglass some filler then sand it flat run your hand over it . just remember in fiberglass running your hand over fiberglass best thing you can do that way you can tell if there is high and low spots , that way you will know exatcly where you are at. Also use more matting with the right amount of resin to much resin make's the mat your working with to hard to work with it will just be dripping to much off the mat etc when you try to lay it. As for the hardner do not put to much , if you put to much hardner in the resin it will come in contact with the resin and heat up very fast and harden very quickly . Leaving you not being able to work with the resin at all. Also when you are sanding and you get the fiberglass dust on your skin DO NOT RINCE OFF WITH HOT WATER , this will only make it much more itchy ALWAYS run under cold water . Hope this helps & Good luck to you and your project a head:D.

carfreak5312
01-22-2008, 11:45 PM
I dunno if the volume is right, that depends on the subs.... sounds prolly close, around 1.75 cubes for each sub.

But that port... how big is it in area and volume?


ok the length is 13", width is 10.5, hight is 2.5

carfreak5312
01-22-2008, 11:49 PM
If its to thin it will sound "pingy".You want it to be as solid as possible.A box that size I would use probably 2-2 1/2 gal. resin and probably 3 or 4 packs of glass mat.

ive used just over a gallon of resin and 2 packs of glass mat. i used one pack of glass cloth. its ALOT easier to go around curves and bends. does it matter what is used as far as fiberglass goes. the mat just gets everywhere.

carfreak5312
01-22-2008, 11:52 PM
One more thing about the port. can i leave that one alone and put pvc pipe like in the two sides. as you see in some of the pics, there is about 10" by 12" piece of mdf on both sides holding the bottom and back in place.

thanks sooo much for the help. i would prolly be throwing money down the drain trying to get this think to sound right..

carfreak5312
01-23-2008, 11:41 PM
:greedy: