I’m utterly unconcerned with seismic vibration, although I do have vibrapods under things and a set of groovy cones (had those for many years…they look GREAT) under my preamp to add ventilation and because they look cool. All costing me very little money. Maybe I’ve addressed this issue accidentally in my home rig, but in live concert situations using 1000 watt amps and subs, I simply don’t see that any isolation potential exists. My main beef is with claims of substantial and audible improvements from uber expensive racks and $500 metal feet. Silliness in my view, and Barry Diament seems as delusional as geoffkait, although that might be a stretch. Note that I use guitar amps that have the speakers in the box with the amp…seismic indeed.Seismic is good unless you are performing SEM and need absolute stillness and then maybe springs make sense or something along these lines: http://www.kuzma.si/zerovibe-6050p.html . Speaking of 1000 watts and subs: https://www.youtube.com/watch?v=K5hBXr3aJus
Robert from SS comes from a Pro Audio background....