SubProtector
thingiverse
I created this specifically because my kids have a tendency to stuff items into my subwoofer. It features two clips that securely attach to the subwoofer itself. Installation requires no tools whatsoever, but if you choose to put one on each side, you'll need a tool like a screwdriver for easy removal.
Download Model from thingiverse
With this file you will be able to print SubProtector with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on SubProtector.