Nsgarch if right on. If the rack is in the corner the vibration issues increase two fold. In acoustics every point two planes meet the energy is doubles. This is why acoustic treatments start in the corner where the ceiling joins. The energy is tripled at this location, as is the fact for the floor. Setting up a rack within this "higher energy" could begin to cause major issues with vibration. If you must set up in the corner, you really should consider adding base traps at the corners and putting the rack at an angle???
Equipment rack behind speakers: bad?
I will be moving into a new house soon and will be forced to place my equipment rack behind my speakers. Is this bad acoustically? The rack has three shelves (vertically) and is sized to handle two components side-by-side. I would think that it would act as a facsimile of a diffusor, as the rack has metal grills on each end (and center between components) and these grills are perforated with many small holes. I guess the only other thing that I have to worry about would be vibrations from the usual bass build-up near the back wall affecting my equipment. Your advice is appreciated!