Do equipment stands have an impact on electronics?

Where is your room? Near me in western Connecticut? I’m always willing to drive up to an hour each way, or even two.

But otherwise, no, it doesn’t make sense. Just because you can feel your floor give when you jump up and down is unrelated to whether loudspeaker isolation improves or even changes the sound. Did you read the article I linked? I explain all of this, and why, in detail. And as I said at the end of the article, I’m glad to see measurements from others proving that isolation does make a difference in their situation. But so far nobody has. And calling me ignorant (not you, others here) is hardly evidence. Nothing audible that happens in a room will evade measuring with the type of software I used for my tests. So yet again I ask for measurements. As Judge Kevin Ross says at the start of each TV show, "Prove your case!" :->)

No, Central Maryland.

The only gear I have to do any tests is my ears. So I know its possible.  It is not subtle at all, perhaps one of the clearest and most obvious differences/tweaks I have heard.    The jumping test I indicated shows that it is at least possible as well. I suspect its fairly common even.

I don’t expect you to believe me though given your criteria for acceptance.

Its most apparent listening with my OHM Walsh speakers that have downward firing ports but I hear it as well with small Triangle and Dynaudio monitors in 12X12 room on second level. In same size room below at foundation level, I do not hear a difference.

That should at least make sense. Whether you believe it can be heard or measured otherwise or not is another story.

Also I would say that my explanation could account for what you measure in a single room but your measurements in a single room cannot account for any others.

In any case I hear what I hear and know what I know and I’m sure there are others with similar experiences. Bring your measuring gear on down and we can perhaps both learn something together. Or try some more tests on your own. New discoveries can happen anytime.

I've been a professional audio engineer and musician for more than 45 years, and deeply into acoustics for the past 20 years. So I have a good handle on what happens in rooms, how things sound and are measured, and - maybe most important - why people think they hear stuff that isn't real. Now, that might seem controversial or even insulting, but you probably know that there's an entire scientific field called "psychoacoustics" that deals with this sort of stuff.

So, as always, the burden of proof is on those who put forth a theory, and after more than ten years of asking for proof nobody has ever shown any. Not once, not ever. Ask yourself why that is.

Ethan, I think room acoustic software is a reasonable endpoint to measure.  There is freeware available to use to this end if people are so inspired.

Here is a video from Townsend that was circulated earlier in this thread as proof of concept but it in no way measures endpoints that are meaningful:

It isn’t hard. Anyone can try and prove to themselves. Obviously your mind is made up. All I can say is you are definitely wrong on all counts in this case so I am not impressed. Better keep on testing. I am not in the business so I have no time or desire to prove anything to anyone except myself but I stated my case and will discuss and share findings happily and honestly with anyone else who happens to care. If you claim to be an "expert" then the burden is on you for your own benefit to make sure that you really are. My advice would be to run some more tests because you are missing something of significance so far it seems.