Speaker grill for Apache 1800 case from Harbor Freight for use with an NVX NSP46 speaker or Polk 4x6. It may fit others as most of the 4x6 speakers have quite a few mounting holes but this is the only speaker that I've tried it with.
You'll need 4 6mm long M4 heat set inserts and 4 M4 screws. I think the screws that I used were m4x16mm.
Usage:
This is intended for the speaker to be mounted from the inside.
Use the template to mark the hole for the speaker and holes you need to drill for the mounting points.
Install the heat-set inserts into the model, mount the speaker from the rear and insert the screws from the back into the heat set inserts.

I don't have a multi-color 3D printer so I raised the center of the grill to appear as though it's separate from the grill frame so I could stop the print and change color for the grill.

Added a UGA version cause go dawgs.