How to Make a Fiberglass Subwoofer Box

Step 10 10. Fleece

You will need enough Fleece, or some other cotton/polyester material to stretch over the big opening between the fiberglassed parts and your speaker rings or MDF. Using some hot melt glue attach the fleece to the top of the fiberglassed area. You will need to then stretch the fabric over the MDF to the other side of the fiberglassed part, securing with more hot melt. You should now have a fabric covering everything that is not covered in fiberglass. Make sure you get every single wrinkle you have out of the fabric, it is very important, make tiny cuts if you have to, but hopefully it will stretch around everything cleanly.

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[sweethomealabama]

Also if you need the fleece glassed into the recessed area of the speaker ring you can take a staple gun and staple the inside corner of the countersink to get it glassed in the corner.