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A Couple Little Things I'm Wondering About

Two quick questions for anyone with any experience with either topic.

1. Why do some folks with usually higher end systems use those cable lifters to keep the cable elevated? What are they intended to do? If you use them, what do they do for you please? And if you know do they make sense from a purely technical standpoint? 

2. I bought a bunch of those gold plated caps to cover all the unused RCA jacks on the back of my AVR. I believe they are intended to keep noise down. If you use these, please comment on them. Do you think they do what they're supposed to do, and/or do they make sense from a purely technical standpoint?

Thanks!
jcolespeedway
rodman99999
6,206 posts
 
Gimme That Old Time Religion, Gimme That old Time Religion...... (ad nauseam)      They’re still trying to evangelically compel those electrons ("charge carriers"), through a conductor (HALLELUJAH!).        Anyone interested in today’s science, can read the, ’Electric Drift’ section, of the aforementioned wiki-science article.               Particularly, the last sentence (since we’re talking AC).        Note that these things are measurable, established and documented.        When one of these faith-in-outdated-science, religious fanatics can prove (via any 20th Century Science/Physics) that the above factors have no bearing on what we’re hearing, I’ll accept their version of salvation.      Is there a purgatory, for repentant doubters, in the Naysayer Doctrine?
mijostyn's avatar
mijostyn
8,570 posts
 
The drift velocity of electrons in copper wire is around 1 inch per minute!
Current occurs immediately almost at the speed of light.  Kijank is right that the dielectric affects the speed and field strength. But also important is the presence and distance to the return. If close the fields cancel out.
kijanki's avatar
kijanki
4,452 posts
 
Staccato effect?  Sure, for people who can hear tiny change in few nanoseconds between supports  (hundreds of MHz). 
Let's assume that somebody can hear the difference.  To me it doesn't matter if this difference is real or it is only a placebo effect.  Outcome is the same.
djones51
4,947 posts
 
Yes, true placebos do work.
rodman99999
6,206 posts
 
With AC; electrons don't drift at all.     They oscillate over a distance of a few micrometers (.0000001 Meter = micrometer), without movement along the conductor.        
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