Here is mine. Pretty simple, but effective. Glass shelves provide support to equipment. Additional MDF shelf to support 5CH Rotel RMB-1075 Amp. Cables accessible via hidden access door to faux wall.
Here is my home made custom equipment rack made out of MDF boards painted black and capped off with some decorative molding for each of the shelves. I utilized this area in my room. It's a 4'x2' alcove section of my room and was perfect for the custom equipment rack to be built within this area. I thought it turned out pretty nice.
I made this cabinet out of some really nice 3/4" plywood from Home Depot has a really nice finish to it. I gave them the dimensions and they cut it then I brought it home cut some channels for the shevles to slide in an put 3 coats of polyurethane on it.