4x4 corners are ceder. Shelves are (2) layers of MDF 1/2" and 3/4" glued together with 1/4" oak plywood also glued together. End caps are 1/4" real oak. I notched out the 4x4's for the shelves. Copper deck caps were my idea, but it could be built with the top shelf covering the tops of the 4x4's. I based the shelf spacing based on my equipment and made the bottom shelf high enough for lp's. I bolted it together with brass 3" screwws and added vertical bracing in the back to hide wires and add some stability.
