I got a simple question about building a box for my friend. He wants me to make a fiberglass box for two 12's. They are Magma 12s. They will be going into a 94 BMW 530. I am going to use the method that VelocityMotors posted. The problem is that he wants the box ported. How should I make this box? I was thinking about making a mock of a ported box out of MDF and then braking it down to where I got the base and back and the ports and then wraping it in fleece. Then go on with the resin and sanding. What do you guys think? Dumb idea? Any and all help is appreciated. Thanks!
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Money didnt change me,Money changed the way people think about me!!
I'm not sure I completely understand what you're asking. The way i'm understanding you is that you're going to first build the box out of MDF then take off the front side of it then mount a ring and stretch fleece and fiberglass over that? is this correct?
It seems to me like that method should work although it seems a little excessive. I'm not sure what look you're intending to go with with this. Have you figured out yet how big you need this enclosure? Also a ported box is a difficult first project as you need to be very precise with volume and calculation. an idea that came to mind for me was to just keep the mdf box together and build a fiberglass top for it like in this post
https://www.the12volt.com/installbay/forum_posts.asp?tid=73856&PN=2
Maybe some pics of the trunk and exactly what you're looking to do and people should be able to help a litle more.
Plan the enclosure out on paper or on the computer & make sure that you account for the total volume required for both subs, the displacement of the subs and also the length and displacement of the port(s). After this start witht he base of the enclosure and work your way up and follow the plan that you have. The main difference between the enclosure that I did and the one that you want to build would be the volume for a vented enclosure and the placement of ports in the enclosure, other than that, the fabrication process will be very similar.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
thanx for the help. i think i might do like the thread grantd posted
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Money didnt change me,Money changed the way people think about me!!