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Seems like any equipment in a metal case is protected from rfi

Looking atFaraday cages in Wikipedia
Here's a quote:

A Faraday cage operates because an external electrical field causes the electric charges within the cage's conducting material to be distributed such that they cancel the field's effect in the cage's interior. This phenomenon is used to protect sensitive electronic equipment from external radio frequency interference (RFI). Faraday cages are also used to enclose devices that produce RFI, such as radio transmitters, to prevent their radio waves from interfering with other nearby equipment. They are also used to protect people and equipment against actual electric currents such as lightning strikes and electrostatic discharges, since the enclosing cage conducts current around the outside of the enclosed space and none passes through the interior.

Why are we trying to quiet the rfi to and from our amps, transports, etc when the metal case already does it? 

kavakat1

Showing 3 responses by nonoise

nonoise's avatar
nonoise
11,210 posts
 
Another "enlitened" response. We have to start thinking outside the metal box and I really can't recommend enough the use of a Schumann Resonator to help defeat electronic smog. 

If you can get a hold of one it would be so easy to try and see if you can detect the benefits. Just place it close to and higher than your head when you sit to listen (5'or more is best) and set it up so you can easily unplug it at will. Listen to some very familiar recordings and judge for yourself. 

All the best,
Nonoise
nonoise's avatar
nonoise
11,210 posts
 
Geoffkait,
Since you mentioned it, I use Clone Audio's Schumann Generator to defeat all that nasty electronic smog. Better detail, instrumental/perfomer separation, layering and soundstage.

I can't wrap my head around how a 26,000 mile generated wavelength can fit in my room, so maybe only a fraction of it's length is generated since a wall wart is used as a power source. However it works, I'm glad I have one.

All the best,
Nonoise
nonoise's avatar
nonoise
11,210 posts
 
A quick look at Wiki states that any hole or vent has to be significantly smaller than the RFI/EMI wavelength in order to stop it. Good luck with that. It enters through any connector not used as well as any cable not completely shielded. Also, AC brings it through your PC. 

Even galvanic isolation inside your component (if utilized) won't stop stray fields from contaminating each other. You can obsess your butt off about it but there are more important things to consider, unless you want to go the Howard Hughes route.

All the best,
Nonoise
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