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Here is the sub box that I am going to build for 2 JL Audio 12” W3v2 subs. I am making it out of ¾” MDF, gluing box together, drilling holes, countersinking holes, screwing the box, and then caulk the seams and carpet.

Here are the plans I made, pretty standard. It is 36”x11”x16” (LxWxH) which is about the tallest and longest box that can fit in our trunk.

If you have any comments or suggestions just shoot

 
Rep Power: 297

nice design, but that is far from the larges box we can fit in our trunks... heres my old one, www.sounddomain.com/id/autolex84
I think it was 38 by 16 by 18

 
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auto84

How tight is the fit with a length of 38"? Is it a struggle to get in and out of the trunk? And in your pictures I see you cut a hole for the trunk hindge. If I made the box 38" would I need this?

 
Rep Power: 297

oooh, sorry i should have told you, thats a trim panel with the slots cut in it, the box is behind it, and i mistyped, its 36 wide but much deeper, good luck man.