12 inch enclosure

hey guys,

I'm building a Enclosure for my 12inch sub, i don't have any specifications on the required enclosure size, so is there a universal volume that sounds good for 12inch subs?

or am i going to have to just experiment with size's?

thanks

What is the model # of the sub? What amp will you be using? What vehicle is it going in? What are your aspirations (SQ or SPL)? What types of music do you listen to?

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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

hey,

I'm after SQ its going into a 2000 lancer CE.
The sub is a boss audio 12inch 1200w BA1290
the amp is boss audio 300w BA2210
and i mainly listen to techno and rock

I know there both cruddy but its my first sub and amp so im building up from that.

My plans are to build a fiberglass box that has a shelf for my toolkit and enough room for my amp and sub enclosure on top of that shelf.

i've never fiberglassed so i decided i'd make the enclosure and shelf out of wood then fg around it all for looks and fit.

make sure you do some research on how the process of fiberglassing goes... It's real simple to end up with a bunch of wasted materials...

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...don't crush the weasel...

yeh, I've read a lot of tutorials from this website and others, and I'm pretty sure I've got it down, thanks for the notice though

I'm just trying to get my sub in a good box this time, seems i just bought a premade 12inch ported box for it, that im convinced after reading these forums is to small for a ported 12inch box

+ the port goes sideways not the same direction of the sub, thats one reason im looking to rebuild a box for it.

 hey "cruddy" subs in a properly designed and constucted enclosure can sound as good as "better" subs in improperly designed and constructed enclosures.........for sq typically sealed enclosures. my advice get the T/S parameters for your subs by calling manufacturer ...download WinISD..its free follow instructions.....or have a competent installer design and constuct an enclosure for you.....good luck

Hey,
so im in the process of finishing up my first layer of fg on my enclosure and there are a fair few spots id like to sand flat,

is it ok to do so after the first layer of fg? or should i wait till im done fiberglassing and sand it all at the end?

the spots i wish to sand back aren't just small rises its where the fleece folded over itself, i kinda stuffed up the fleecing so yeh.

thanks

 i would wait to sand until all layers are layed down....on your next fg project try using grille cloth instead of fleece because gc is alot thinner than fleece and if you have to fold over not as big of a rise..gc is more expensive but soaks up less resin than fleece saving money ....and try not to fold over your fabric(lots of sanding...frustrating)..stretch fabric from center out ...a few extra minutes spent stretching fabric leaving no wrinkles will save hours of sanding good luck keep glassin

hey,
Thanks for the advice,
I'll post pics when its done.

(edit)
Hey, i have a question about the body filler mix, what is the reason for adding fiberglass resin to the mix?

I've been asking around vehicle repair shops and they can't understand it as it would be too hard to sand with FG resin,

is the normal body filler and hardener to brittle without the resin? or is it something else? any help would be great,

Thanks

hey, so i started building the box and tested it the other day, i noticed the back of the box flex's still so I'll have to add more layers of fiberglass.

My question is can i add ribs of wood then fiberglass over them 2 make it completely solid, or would the air trapped in between the ribs weaken it?

The reasoning for the resin in the filler is to thin it out. Commonly referred to as a "milkshake", it make the filler thin enough to paint on, filling any pinholes in the process. Mix 5 parts filler to 1 part resin and add the appropriate amount of hardener for each and voila! Let it cure, and sand away.

And for your second question, instead of using wood, get some 3/8 rope from the hardware store and use that. All you're going for is the rib effect. Fiberglass gets its strength in its curves. The trapped air wont affect it as long as the layers you've layed down before the rope are thick enough. You're probably gonna want between 5-7 layers of mat on the flat areas, then put 2-3 layers on top of the rope. That should make the box bulletproof (in a matter of speaking). Good luck with it.

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I'd rather be in the boat with a drink on the rocks, than in the drink with a boat on the rocks!

Thanks for the help and info.

crewwzin wrote:

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And for your second question, instead of using wood, get some 3/8 rope from the hardware store and use that. All you're going for is the rib effect. Fiberglass gets its strength in its curves. The trapped air wont affect it as long as the layers you've layed down before the rope are thick enough. You're probably gonna want between 5-7 layers of mat on the flat areas, then put 2-3 layers on top of the rope. That should make the box bulletproof (in a matter of speaking). Good luck with it.

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I think he was asking if adding ribs would strengthen the enclosure... It didn't seem like he was asking a cosmetic question...

I could be wrong. ^-^

Ganbatte ne!

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Never send your ducks to eagle school.
The difference between ordinary and extraordinary is that little extra.
The 3Ls of life: Learn from the Past, Live for the Present, Look to the Future.

I guess I didnt make myself clear enough when I didnt mention that the rope goes on the inside of the enclosure. Kinda like your ribs are on the inside of your body. Not a cosmetic issue at all.

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I'd rather be in the boat with a drink on the rocks, than in the drink with a boat on the rocks!

yeh, i was asking for advice on strengthening it, so your saying rope would strengthen it?

I dont see how it would, seems rope has a fair bit of give in it.

You're missing the point. I'm not saying the rope will strengthen the enclosure at all. What I'm saying is that the 2-3 layers of glass layed down on top of the rope will have 3/8 inch ridges in it that will strengthen it greatly. Check this thread out.

https://www.fiberglassforums.com/showthread.php?t=4117&highlight=rope&page=16

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I'd rather be in the boat with a drink on the rocks, than in the drink with a boat on the rocks!

ahh, i see what you mean now