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Discussion Starter #1
Hey everyone!

I registered on this forum for one thing, and one thing only. That is to help my friend get his subs into his Intrepid. He's been waiting for someone to come along and build him a sub box for a very long time. He has 2 15" Alpine type R's and he knows it's going to be a very tight fit in his car. I've looked up specs for a box to have 2.9 cubic feet of air inside, which is recommended for these subs. Ideally, he would like 1 ported box that fits both the subs. The dimensions recommended for one box is 19.5" x 16.5" x 20". I've never built a box for subs, but I have built boxes for bass amps. I'm not sure how similar or different they are. I was just wondering if anyone could draw up a box that would fit the trunk with the things I have listed.

Thank you for ANY help whatsoever!
Tyler
 

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not sure about the trep - the rear deck in the 300M is only 14.5" tall. I had to beat my box into place smashing the insulation material on top of it. I've designed boxes, but not for 2 15's, certainly not for two ported 15's... that would be A HUGE box.
 

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Discussion Starter #4
FranxxVideos on youtube did it, but he ported his rear deck. I figured It would stay behind the insulation unless we can make it fit. Anyone got any dimensions?
 

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The Womanizer!
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You wont get 15" subs tucked under the rear deck in an Intrepid or an M. The box will have to be built out into the truck area a few inches to allow for the taper of the the speaker. This is a custom built box that fits under the the rear deck with 12" subs....as you can see there isn't much more room to go bigger. I can still get to my spare without moving the box too!

 

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Discussion Starter #6
What about a sealed box? Would that fit in the Intrepid? I was also thinking about an inverted setup.. Would that change anything, fitment wise?

Thanks guys!
Tyler
 

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The Womanizer!
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The one I have in the above picture is a sealed box.
 

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He got the system for SUPER cheap from a friend who went to competitions.. and won. I honestly don't blame him for buying it, but he said he's going to make it work somehow. Maybe make two boxes and put them behind the wheel wells? I'm not sure. It will be loud once he works something out though.

Thanks for the help!
Tyler
 

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Bitches be like...
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He got the system for SUPER cheap from a friend who went to competitions.. and won. I honestly don't blame him for buying it, but he said he's going to make it work somehow. Maybe make two boxes and put them behind the wheel wells? I'm not sure. It will be loud once he works something out though.

Thanks for the help!
Tyler

behind the wheel wells wont work, your only option is to put a huge ass box in the middle of the truck, with the subs on an angled up towards the trunk lid. kiss your trunk space good bye!!
 

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Well, bass is not very directional like treble is. Some folks put them on the sides and point them toward each other.

I had a hard time fitting a a box for a 10" sub behind the well, firberglassing a closer fit would have helped but for a 15? I dunno. I don't think it will fit there. Plus you don't want them aimed right at each other.
 

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Discussion Starter #13
I found a box on hifisoundconnection (dot) com that might work. I'm pretty sure it would fit right behind the insulation part in the trunk. It fits 2 15s, has a 10" mounting space (type r's need 9-5/16"), and a 3 cubic foot space for each sub (type r's need 2.9 cubic feet for each in a ported box). It'll be a tight fit, but it might work.
 

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I found a box on hifisoundconnection (dot) com that might work. I'm pretty sure it would fit right behind the insulation part in the trunk. It fits 2 15s, has a 10" mounting space (type r's need 9-5/16"), and a 3 cubic foot space for each sub (type r's need 2.9 cubic feet for each in a ported box). It'll be a tight fit, but it might work.
What's the box size? I doubt if it will fit thru the trunk opening....
 

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I had a hard time fitting a a box for a 10" sub behind the well, firberglassing a closer fit would have helped but for a 15? I dunno. I don't think it will fit there. Plus you don't want them aimed right at each other.
Putting them on one side is plenty doable, but facing each other is iffy. There is a pretty high chance of the sound waves canceling each other out and it sounding like crap.

A ten would be easy, but a fifteen? I have two 8s with getting the full recommended volume, and that's without even using fiberglass to get a perfect fit. Those 8s are for low volume enclosures though, so I'm not sure if there even is a 15 designed for that. Perhaps a 12 could be done though.
 

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It's 40" wide, 18" high, and 19-1/2" deep. I just thought we could wedge it in somehow..
i'd have to look in my trunk to confirm my idea, but you may be able to completely remove the rear seat and then slide the box in. . . . . and reinstall the seat afterward. but i am not completely sure that the box would fit around the wheel wells in the front end of the trunk.
 

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Discussion Starter #18
It won't fit between the first space behind the seat, but it will in the second space. The one I'm talking about it just behind the insulation where, I'm guessing, there is a strut tower brace? I think if the back seat came out, we could push in one side to the back corner of the trunk, then rotate in the other side? Or maybe try the same thing from behind the car?
 

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Tell you what right now I have 1 15" and it hogs most of the trunk as in if I need to get to the spare out comes the box. I am not quite sure of the size on the box (hell, I didn't build the damn thing) but getting 2 15's would be a challenge. However it has been done. I would PM Rusty Shakelford he has 2 15"s in his trunk.
 
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