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      05-04-2010, 02:21 AM   #1
tuhojuho
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Finland
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Drives: E92
Join Date: May 2010
Location: Finland

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Custom fit subwoofer box

I want to show my idea to build a custom fit subwoofer box for E90. Eventually this box appeared to be too small for my woofer element and I decided to discard this and build a separate box instead, but you can get the idea..

There is a good space for a small subwoofer under the trunk floor. You can use the felting as a mold for glass fiber work.

Here's the step-by-step:
1. Cover the felt box with aluminium foil
2. Laminate one layer of glass fiber on the covered felt and let the resin dry
3. Remove the original box from the box
4. Remove most of the aluminium foil
5. Laminate some plywood or chipboard to inner walls of the box
6. Cut the excess glassfiber and make a frame for the woofer and attach it to the box
7. Finish the box with felting and filling
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