I was thinking that too, however when factoring in that the sub will be behind my screen wall, nothing should fall in. If I had it out in the regular part of the theater, then I would just fork over the $55 and get the grill. I could get a cheaper pre-made grill for a lot less, but they are all round. I would have had to plan ahead for that one by routering out a recessed grove to make it look more "integrated" with the sub box.

For example, I could get something like this:

They range in sizes from 5.25" (too small to cover the port tube flange) up to 15" which would be almost the whole top (the top of the sub box is about 17.5" x 16"). Costs are about $4.50 up to about $14 plus shipping.

I've used those before for my MAME arcade to cover the speaker holes. They are easy to use, but do stick out a bit.

Farewell - June 4, 2020