Tutorial: How to make a fiberglass subwoofer enclosure in the spare tire area for a single 12”. You will NOT lose the spare tire.
Car: 02 WRX (sedan)
I was finally annoyed enough with not having any trunk space, so decided to be creative. I know it’s been done before hundreds of times but it was new to me. I had never fiber glassed before. It’s not as bad as it sounds.
Disclaimer: If anything goes wrong it's not my fault. Blindly follow these instructions at your own risk.
Materials: A gal of resin should do. $35
Fiberglass 4-5 packs $30ish
Wood various sizes $20-30. I used ¼ and ½ inch mostly.
Misc: brushes, staples, acetone, duct tape, painters plastic. ~$20
Final: $~120 give or take $20.
First I took some pictures, made some measurements, drew out a plan, got all the materials I would need and then went at it.