Gator Cases gives us a look at their line of molded audio rackDefinition:
A frame for holding gear that meets an industry standard for enclosures. This specifies a 19 inch width, and a height that is some multiple of 1.75 inches. A rack frame can be open or enclosed, and has rails drilled with standardized screw holes for attaching rack equipment.. cases. Constructed out of molded polyethylene, these cases are available in several varieties: standard, shallow, shock mounted, rolling and powered.
Each case features a lid on both sides with butterfly twist latches, as well as comfortable recessed handles. The rolling and powered rack cases also include a tow handle and recessed roller blade style wheels for easy transport.