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component enclosure - yes or no...?

Old 08-06-2007, 02:26 PM
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component enclosure - yes or no...?

Hi there, i've got a 98 jetta - and i've upgraded the rear deck speakers to some JL components (behind the rear seat). Now, since i'm new to car audio, not sure whether building an enclosure is a MUST...am a little weary since they would be using the same air space as the box in the trunk.

So that said, say i do build an enclosure - how do i make one? - on the cheap
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Old 08-06-2007, 02:31 PM
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here's a couple of pics of the stock housing that i'm using. Which will be exposed in the trunk area.
Attached Thumbnails component enclosure - yes or no...?-picture-3.jpg   component enclosure - yes or no...?-picture-4.jpg  

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Old 08-07-2007, 09:09 AM
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Oh man, i have gone through this with myself soooo many times. I hope someone can give a good answer for this since i am stumped myself. I have been debating on this for so long now between the last few cars i have owned. The rears always seem to tear apart whenever the back seat is up, and the fronts never seem to sound right. I wondered if giving the fronts some sort of box in the door or something if it would make them sound a bit better. I have tried several different fronts and was never happy with any of them. In fact, the stock factory speakers might have even sounded better than anything else i have tried.

A friend suggested using fiberglass to make boxes, but i dont have all that much experience with fiberglass and highly doubt i could make anything decent out of it, so im hoping to find some other ideas on here.
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Old 08-07-2007, 04:45 PM
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Old 08-07-2007, 05:11 PM
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You can start by using deadening for your door and ensuring that there is no air gap around your speaker. If you could make an enclosure for it it would definitely enhance the sound. To make one in a door though, you have to cut an opening to be able to place your mdf enclosure.

But the easyest is to try to seal off the door from your cabin. Try b-quiet.com for deadening material.
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Old 08-08-2007, 02:44 AM
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thanks AAAAAAAAAA...

speakers aren't in a door though - i can handle that.

it's in the rear deck area behind the rear seats - just above the trunk. so the speaker bottoms are basically just hanging open above the sub enclosure.
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Old 08-08-2007, 06:57 AM
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Sorry, for not reading correctly.

Whats happening is your subs are basically pushing and pulling on your speakers in your rear deck. That's why they sound so bad.

Best bet is to build an MDF enclosure around them if possible. If you go to Rona you can buy small pre cut peices of MDF so it won't cost you to much.

But really what you need to do is dump the rears
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Old 08-08-2007, 10:51 AM
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they don't sound bad at all. just want them to sound better. got a load of trunk space, so don't think the pressure is that drastic. have run then with the subs off and they move pretty much the same amount.

is MDF the only solution to make this enclosure? nothing i could say, wrap around the stock housing (in the pic up there) and just seal it?
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Old 08-08-2007, 01:30 PM
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If you can , turn off all sound going to your rear speakers and turn on your sub to the volume you usually listen to.... I think you might be surprise to see how much they are being pushed/pulled by your subs.

You can't just close off the back of your speakers, that would'nt have enough air space.
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Old 08-08-2007, 01:33 PM
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You can blow your component woofers by having no alternate path for the air to flow between the trunk and the cab other than those speaker holes. I've mostly seen this on stock speakers but it is not rare with aftermarket ones depending on the setup in the trunk -- sounds like you are fine with your setup though.

If you don't mind the work the best solution would be to make a fiberglass bowl with a flat top on it and mount the speaker in that, and then mount the whole assembly into the deck... but thats alot of work for marginal gains -- your rear seat passengers probably wont mind not having a sealed enclosure on their component woofers.

Last edited by tg989; 08-08-2007 at 01:43 PM.
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