Vibration - What are the Main Sources?

I believe the premise is that the speakers are resting motionless on the springs at a specific tension and the function of the spring is to isolate/dissipate vibration.

Dissipation of cabinet frequencies can be better achieved by using TMD (tuned mass damper) technology. This technology is used in modern high rise buildings with great success.

https://dspace.mit.edu/handle/1721.1/38947 If it's of any interest?

Basically a TMD for a speaker will allow it to be decoupled from the cabinet, and yet reactive to the vibrations of the cabinet, so that it can cancel out the vibrations by being out of phase in it's motion to the cabinet.

So the springs from below are being deformed by the cabinet, transferring kenetic energy to heat through the springs, and the sprung mass on top moving out of phase with the cabinets to oppose the energies each see from each other.

I know, it may sound absurd, however, in person it sounds truly superb.

rixthetrick,

Thanks. The springs are for my TT, mostly as an experiment :)

Hoping the spring retailer will help me figure out a spring rate that makes sense.  And yeah, height/diameter is important. Don’t want stuff swaying :)  And I’m thinking to start with spring rates such that there is an equal force required lifting up or pushing down to have it move the same distance. As close to floating as possible.

And agree, the math behind K Minus is above my pay grade. 1/2hz and 1hz, crazy low they go. 
It’s fun to play with this stuff. Especially when cost is low. Added bonus of course, when it works.

  Vibration haters relent. ALL vibration can't be bad can it? I do not like train causing vibration when it comes through town twice a day. Rumbling ground and squeaking wheels and that damned horn! Yes,  that is certainly bad vibration contributing to absolute distraction. Conversely, am I attending to what might be a microscopic demon shaking at my TT's cantilever? Certainly not a train, but undesirable non the less. So then, let's pick our battles here. IF a small vibration passing through a capacitor can be heard by me, then it is a problem. If not then I should pick my battles more wisely. 
 One vibration of some sort or another can be a pest or even deal breaker for listening. Several vibrations combined or not, pulling at the threads of notes themselves lift me from the listening chair displeased and uninterested. Chasing them down is a lottery ticket at best unless you have some insight, no not likely from salesmen or tweakers, but from acquiring usable knowledge of your particular situation and verifiable progress.

@carpathian

I believe the premise is that the speakers are resting motionless on the springs at a specific tension and the function of the spring is to isolate/dissipate vibration.

So the premise is whatever energy would make the speakers move is dissipated through the springs and the tweeter and woofer do not move?

I believe the springs are to isolate the speakers not from their own vibrations, but those from external sources. If the tweeter and woofer did not move, you would have one quiet speaker!