4" speaker box
thingiverse
I fabricated this speaker box thingy to mount 4" speakers securely on the parcel shelf in my car without any invasive modifications. The design features flanges on either side for making screw holes when necessary, but I actually opted to hot glue the boxes directly onto the parcel shelf due to its sturdy surface. Please be aware that if not properly secured, loose objects inside the vehicle can become deadly projectiles during an accident. The mounting surface of this speaker box has the same outer diameter as my speakers' original grille, which is branded "Biltema".
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