Do equipment stands have an impact on electronics?

1) Shunyata Dark Field Elevators for cable isolation
http://www.shunyata.com/images/technical_features/dfss-chart.jpg

If the claim is that these images demonstrate the benefits of cable vibration isolators then I call BS. Notice please:

1. The time (5 ms/d) and voltage scale (50V/d). This is clearly a measurement of a 50Hz or 60 Hz/220V AC power line, not speaker or signal level.
   
2. Where the noise is occurring, at the upper peaks. This is not floor or air-borne noise. It’s probably AC line noise possibly caused by a digital power supply on the line or transformer problems.
3. The magnitude of the noise itself, around 50Vp-p but of very high (relative to 60 Hz) frequency. That kind of noise in the line or speaker would be audible if not damaging to components. In an AC line they are easy to filter.
   
4. There are no measurements (in addition to the charts) provided.
5. There is no description of the test conditions.
6. Items 4 and 5 mean this test is irreproducible. No one can refute them because you can’t test under the same circumstances.

Charitably I would say they posted the wrong pictures. If you said these were pics for a 220 V power conditioner I’d say "Hey, it’s cleaning up something! I wonder how they tested..."

Also please note, all these statements above (including BS) are in the engineering domain. All the attacks that follow will be personal, name calling, etc. Well, let them begin.

I will always look forward to careful thought out replies like "Hey Erik, you missed this link which explains...." or "I like mine!" Those are all fine, I’m not challenging your subjective experience, just saying, those pics don’t make sense.

Best,


Erik

Erik -- I have nothing to add to your comments, best take them up with Shunyata directly. My point was mainly to surface some instances of data on even the most "implausible" of vibration related effects (e.g. on cables and on electronics) and point to data discussing the potential causes, which is not hard to find despite agear's attestations to the contrary

As I've said before, testing and measuring the benefits of vibration control in home audio should be easy, and inexpensive. I've yet to see the loop closed.

Doing this work could lead to cheaper and better sounding equipment when we have definite, exact, nuanced information to guide our manufacturing choices. If any of this exists for audio, I've yet to see any of it.



Best,


Erik

Erik -- I have nothing to add to your comments, best take them up with Shunyata directly.

That's far beyond the level of attention this deserves. :)

Best,

Erik