適用于e21 bmw 320i的4x6至6.5英寸揚聲器適配器

I was trying to find a way to get a little more sound out of the stereo in my classic 1981 bmw 320i, and so decided to see what it would take to get 6.5" speake to fit in the factory 4x6 location without cutting any holes. I made these speaker pods as a result, they are countered to avoid the lip on the rear parcel shelf, and will fit most 6.5" speake. Speake with larger magnets may need more clearance.
Printed with 70% infill so they'd have some heft. So far they fit and sound great, I'm experimenting with different mounting optio, the holes are meant for the factory mounting points, if you have better ideas feel free to leave in the comments.