You know, there are measurements and measurements. If you are looking at a scope image of a waveform thru an amp in a vibrating box, and subtracting that from the un processed waveform, differences down to -100db or more will be easily seen. That's good enough for me.
What all the isolation folk forget is that not only is the component base vibrating but the AIR is transmitting such vibrations, which are typically uncontrolled. A room excited to 85db with 95db peaks or more will certainly be loud enough to couple to even well damped gear.
When we did vibration stuff with low frequency quartz crystals, we used a then couple year old Crown DC300 to drive the table.
What all the isolation folk forget is that not only is the component base vibrating but the AIR is transmitting such vibrations, which are typically uncontrolled. A room excited to 85db with 95db peaks or more will certainly be loud enough to couple to even well damped gear.
When we did vibration stuff with low frequency quartz crystals, we used a then couple year old Crown DC300 to drive the table.