This is the front of the theater with a small half bathroom on the left the the electronics closet on the right. The electronics closet shelves were built like tanks. I used 2x4s on the sides screwed into studs. Also, 3/4" shelves with (2) 3"x1" aluminum "I-beams" under each shelf. This is the keep the shelves from bowing.
My (2) big ATI amps are 75lbs each, so I need good support under them.