The speaker is built entirely from 12" mdf boards which lumber sources sell in 16' lengths for 70 cents/ft. You will need two 16' boards which you should have the yard cut into two or more pieces for transporting. I had them cut each board 6-1/2' from one end. What's important is that you have them cut so you can subsequently get five 36" lengths from each 16' board. NOTE: The "12" boards are really 11-1/4" wide.