Good question. I sure do not know, but it sure does.

Here's some reading for you:

Isolation footers for amps

Isolation for DAC/Class D Power Amp

DAC Vibrations?

vibration control

Weights on top of equipment to dampen vibration

What isolation feet under your amp with great result?

A long time ago during a heated discussion along this line, a member who was a physicist, told of how they measured lots of vibrations in concrete (or some other super dense material). This was in an isolated room, away from outside influences and I believe it was in response to music being played. Normal measuring devices couldn’t pick it up.

When I got my Iso-Acoustic Orea footers for my integrated and SACD player, I tried them out on the integrated first, thinking it would be of minor, if any, improvement and wouldn’t be apparent if I tried the SACD player first. I was wrong. The Oreas made a slight but notable difference in the sound, all for the better. More focus, better sound staging, etc.

All of this was done on my carpenter made audio/video stand made of 1" thick maple. You won’t know until you try it.

All the best,
Nonoise

I follow the damping/isolation prowess of Angela Gilbert Yeung, but long before that I started damping everything. Transformer isolation is a biggie, for sure. The top panels of gear are very "ringy" and "reverberant" sounding. Damp them with a Dynamat type material and you will be surprised that the component will now sound quieter and more resolute through your system. Oh, I have been damping speaker horns for over 50 years now. My best, MrD.

observe the paper read out from a seismograph. all those squiggly lines. now add resonance feedback from playing music over the top of that. now add any industrial noise, or traffic noise, or waves or even airplane noise.

all those things are the resonance noise floor of your system, and that is adding background noise to whatever you hear. so it subtracts from the purity of the music reproduction.

it effects the racks, the electronics, the cables, the sources, and the speakers. might be more obvious and easier to understand in a turntable where the stylus is reading vibrations, but it's effecting everything.

you can eliminate almost 100% of that.

and electronics are definitely affected by that noise. the noise reaches your speakers as distortion. and that distortion locates the sound as coming from your driver, instead of from the music in the soundstage. so it lowers the realism. lowers the immersion of the music. adds an edge, masks detail.