Hi Eagle: Tom Lyon is an authority on this subject if anyone is... As I recall, Mr. TWL has done mega experimenting with racks, shelving, & platforms. I've tried to emulate some of his sage advice & have come to realize that *everything* affects the sound of a detailed/revealing rig. There are no absolute solutions in that regard; you must experiment with your own combination of components, shelving & rack in order to find what works best for you. Rigid coupling of your rack to the concrete floor via spikes would be a good beginning; the carpet certainly isn't doing you any favors.
One particularly frustrating lesson for me: I had finally found some reasonably good-sounding combinations of shelving & footers (different optimum combo's for each component) then I decided to get a larger rack. Replacing the rack itself changed the whole character of the rig, then I had to begin my tuning experiments all over again.
One particularly frustrating lesson for me: I had finally found some reasonably good-sounding combinations of shelving & footers (different optimum combo's for each component) then I decided to get a larger rack. Replacing the rack itself changed the whole character of the rig, then I had to begin my tuning experiments all over again.