mijostyn"The only vibration sensitive devices in audio are the phonograph cartridge and the microphone, both for obvious reasons."
You are so wrong and yet you state, pronounce, and proclaim your Audio "Truths" as though they are the 10 Commandments!
there are many other sources where vibration may influence, distort, or alter the sound of the audio signal of course I only need one example to prove you wrong and confused.
Anything with vaccuum tubes is subject to microphonics which can be influenced by vibrations that is easily demonstrated, measured, and heard. I seem to recall that you have problems with giant flapping woofers in you're Music Reproduction System so you may want to think about vibrations instead of just using a massive "rumble" filter to resolve, repair, and remedy you're problems!