Do equipment stands have an impact on electronics?

That should not be hard to do. Place a preamp on the stand to be tested. Run the volume up with a shorted input (phono would be best). Subject the preamp in the stand to a 20Hz tone measured at 90 db at the front panel of the preamp. Observe for the change, if any from the output.

Have you done it?  I am assuming no.

Part of that is because the guy tends to be a bit of a troll. For example, once he made the claim (and likely still does) that power cords can't make a difference- 'it's a power cord!" was about all you could get out of him. I challenged him to show his measurements, since he's a measurement guy. The funny thing was he didn't have any, and I did. They were pretty easy to obtain, too. When I pointed out that we could see a more than 2 volt drop across the power cord his instant response was that the power cord was a piece of crap. Now that struck me as trying to have it both ways; apparently even by his testimony power cords can make a difference even when they don't. 

Like Mr. Kait, he is a pugilist but has valuable things to say.  I am sure he would dispute your revisionist history of things.  I am aware of the fact that he can be a flat earther in certain areas.  He is certainly not a fan of Starsound's approach to room management.  I do know he is a fan of cats.   

After all that he finally did get banned from that site. I don't find him all that credible and often a bit obnoxious, but that's me.

In and off itself, that does not mean anything.  I have had friends banned from sites for stupid reasons.....much like the gov't cracking down on "fake" news.

Sure- why not? Same test, just using the Diament system.

If you did this all with a sweep tone, it would be possible to show the strengths and weaknesses of the 'isolation' system under test.

Sound Anchors did something very much like this- only they bounced a laser off the surface of the loudspeaker that was mounted on the speaker stand that they were testing. The less noise that the reflected laser beam showed the more effective the stand. They were doing that a good 25 years ago.

The laser idea seems weak to me and only provides indirect evidence that we are supposed to surmise things from.  Maybe you can elaborate.  How was the laser "noise"measured?  Again, it tells you little about output variables pertaining to speaker performance and/or electronics as Geoff intonated.  

Agear wrote,

"How was the laser "noise"measured? Again, it tells you little about output variables pertaining to speaker performance and/or electronics as Geoff intonated

Tom used the word refracted when I’m reasonably sure he meant reflected. You can see how much or how little the reflection of the laser beam jumps around on one of the walls. This laser reflection method is actually not far removed at all from how LIGO works, inasmuch as in LIGO a laser beam travels down a very long tunnel kilometers in length and is reflected back precisely from a mirror at the far end of the tunnel. Then the laser beam travels back to the original end of the tunnel and the influence of any gravity waves can be seen on an optical screen. Unlike LIGO, however, using lasers on speakers to measure their motion doesn’t necessarily indicate the speaker stands’ isolation effectiveness. The stand could be simply transferring energy to the floor more effectively than nothing at. AND in doing so actually making the sound worse!

I’m quite sure you didn’t mean to use the word, intonated.

Thanks for pointing me to this thread. Yeah, "revisionist" is the right word. :->)

Here’s the thing: When someone makes a claim, the burden of proof is on them. It’s not up to me to prove that a 2 volt drop doesn’t have an audible effect. It’s up to the claimant to prove that it does. This is Logic 101. More important, trying to assess the affect of a power wire by measuring the AC power voltage is beside the point. The *only* thing that matters is what happens at the output of the connected equipment. Competent audio gear is immune to small changes in voltage, and routinely filters out the typically small amount of noise riding on top of the power voltage.

As always, I’m glad to be proven wrong, and I promise I’ll change my opinion immediately. But in all the years I’ve been at this, nobody has ever provided such proof. Which makes sense given that electricity at audio and power line frequencies is fully understood (by electrical engineers).

I just realized the topic of this thread is vibration isolation. I love this topic! Why? Because it's so easy to prove or disprove by measuring. But who has ever done that? Well, I did not long ago. Enjoy:

http://ethanwiner.com/speaker_isolation.htm