Vibration - What are the Main Sources?

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!

The goal is to isolate the speakers from interacting with the floor. When that happens the vibrating floor essentially becomes part of the speaker typically resulting in muddy bass and obscured midrange and detail. Suspended plywood floors found commonly in modern homes in particular are problematic in this way.
Springs under the speakers might work fine though they do not provide a firm foundation for the speakers to operate on. Might produce some interesting results but have never tried. I personally use isolation pads and stands, not springs. I do have some spring loaded feet under my dac but don’t think they are critical for that.

I got disappeared.

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Me too..

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If the tweeter and woofer did not move, you would have one quiet speaker!

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There is just mids and highs being used in my monitors, and they are small planars and ribbons in a 425 # HDF cabinet. There’s not much moving, especially the cabinet, the forward baffle has a convex taper from 12.5 to less than 6" wide.

It doesn’t even collect distortion very well.
I still isolate the cabinet from the floor and don’t use the bass section at all. Haven’t for years.. BASS belongs in another cabinet.. Subs are already in their own cabinet.

How do you mechanically time align bass drivers in the same cabinet as the mids and highs.. You can’t... At least I never could.. Sub frequencies forget it... they are WAY out of alignment with the main monitors, much less the whole vibration thing..

Regards

If the tweeter and woofer did not move, you would have one quiet speaker!

hahahaha yes, silent

It is mostly in the minds of lay people who have no background in science and do not understand the psychology behind hearing. The only vibration sensitive devices in audio are the phonograph cartridge and the microphone, both for obvious reasons. They are the only devices that need to be isolated from environmental vibration/rumble. It is generated by the stereo obviously, devices in the house like the refrigerator and AC and finally the ground shaking from such things as big trucks running down your street.
Electronics are not effected by vibration. Electrons could give a hoot. If they were we would have F22s crashing all over the place as they are completely controlled by electrons. If we blinded all these silly people they would never be able to tell which devices were isolated or not excepting perhaps the turntable. Silly in the Monty Python sense. 
This circus is subsidized by reputable manufacturers who do not want to alienate potential customers, they remain quiet on the subject. Others take advantage of it. Why not? All is fair when it comes to making money.
If people want to spend their money on silly things it is their prerogative and problem. Big Pharma does this in spades.