Do equipment stands have an impact on electronics?

agear: What kind of spurious signals and how was it measured? Anyone?

to which atmasphere replied,

"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."

Uh, atmasphere, agear was referring to the Barry Diament isolation system, you know, the roller bearings and air spring thingie. One trusts you don’t actually think your suggestion applies to isolation devices.

cheers,

geoff kait

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. 

atmasphere

"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."

By subjecting the preamp front panel to a sweep tone how would that test the isolation device? I’m getting the feeling we’re not on the same page. In the case of a preamp on an isolation stand wouldn’t the proper place to apply a force be the bottom of the isolation device? You know, to gauge how well the isolation device rejects vibration coming up from the floor. Vibration produced by Acoustic waves in the room and induced vibration are another story.

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.

There were no speaker isolation stands 25 years ago. Not in the literal sense of the word, anyway. 25 years ago vibration isolation was not even a gleam in some audiophile's eye. Using the laser as you described would not give a sense of how much energy from the speakers was being fed back into the front end electronics via the floor. I’m getting that feeling again we’re not on the same page.

The amount of reflected signal refracted back into the signal path is what's most important. The signal path is all solid materials including their boundaries with other solid materials. You cannot measure refraction with a laser as described. Tom

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.