Step 6: Selecting how to mount the speakers
For my build, I placed the speaker grill in place on my box and traced around it. Then, I used a straight edge to draw a line 1/4" inside the outline of each of the 4 sides of the grill. Using a jig saw with a very fine plywood blade, a sawed out an opening on the internal (smaller) lines that I had drawn.
Using the correct size drill bits (or ones that are close enough for you to ream the holes bigger), drill the holes for the controls, the jack, and the LED.