If you have noticed the missing speaker panel it was intentional as I am undecided about how to do it. I have the speakers that I removed from the tv. They are 8ohm and the specs for the TDA7297 amp I have says it will drive them. They are oval 2.5" x 4" and I didn't like any of the speaker grills that google turned up.
While rubish browsing at work I came across this:


I thought I could diy something. Here is my attempt so far.
This is the speaker template that I have used to route holes in the speaker panel. Also in the picture is a piece that matches the speaker hole but has 1/8" gap around the edges.

I cut out a piece of the mesh and laid it across the opening. With the block on top I began pounding / extruding the mesh through the template. After a dozen or so belts ...


Eventually I got to this ...


Then removed it from the template.
