Vibration - What are the Main Sources?


A current thread discussing the best tweaks gave consistently high ranking for component isolation. I am curious to know where all the vibration is coming from that we are addressing with isolation. I understand that high volume listening can create significant vibration, but for the sake of this discussion let's assume we are listening at moderate levels. Can the vibrations from moderate sound levels affect the quality of sound? Are there other common significant sources of vibration that we are guarding against that can dramatically affect sound?
zlone
Post removed 
Miller again:   "Putting the component on springs does not prevent anything from vibrating..."         Boing boing

Precisely.  Putting loudspeakers on springs positively ENCOURAGES them to vibrate.  Under Newton's Third Law, the moving parts in a speaker will create movement in the speaker box or frame that springs will permit.  Under Hooke's Law, the springs once deflected from their start positions will seek to return to them.  And so on...boing boing boing etc.

Result: Rock and Roll.   But not of the kind we want.
Moving speaker boxes and frames = smeared sound and deteriorated imaging.
Millercarbon,

Do you honestly believe that I, and the others named on whatever letter you’ve received from some nut case had anything at all to do with it??!!
Just because said nut case decided to use our user names, you truly believe that we all somehow got together and conspired to threaten you?? You truly believe that enough to print our user names on this thread as if we did??! Good God man, think a little.
Get a grip. I had zero, and I mean ZERO to do with whatever it is you received. Yeah, we’ve all nothing better to do with our time than to forge a secret cabal against you. You are that ingrained in our lives. Ridiculous.