1. Measure the length and width of your speaker. In my case, around 7 in x 7.9 in for the M-Audio BX5a.

2. Measure the length of the XLR or 1/4" TS connector coming out of the back of the speaker to accomodate for space clearance if necessary.

3. Cut board/shelf slightly larger than the footprint of the speaker. In my case, 7.5 in x 8 in rectangles.

4. Optionally sand and spray-paint the parts. Remember to take out the clamps prior to painting.