How important Is shielding with RCA wires? (Ethan Winer, new video)

There are 4 kinds of science at least: anti-science, Democrat science, Republican science, and Real Science. I am an engineer and I know from experience I can use Real Science to design products the others are useless in product design. However, this is America and you are free to follow whatever science you choose to follow.

Shielding is a highly misunderstood subject. Typical conductive film shielding is good for radio frequencies only. Adding woven conductive shielding over the top of film shielding will extend the useful frequency range downward. There is one exception to this, but you are not likely to encounter it. If you check the cabling catalogs you will find its effective range is above 60Hz, way above 60Hz. Making use of the "Ma Bell" twisted pair patent will help isolate the signal on a pair of conductors.

Keeping RF out of your equipment will reduce the "noise", but it is difficult to quantize. With today's equipment you can detect the RF in a system and display it. In short you can measure how good of an antenna your system is. Can you hear it? Sometimes. If you can measure the noise floor, you can detect the difference. Can you hear the difference in the noise floor? Not everyone will hear the difference and the noise floor of the recording maybe the limiting factor. Proper equipment design will limit this problem but not eliminate it.

60Hz hum, I would look for a grounding problem first. The 60Hz range is near field interference, magnetic field. Common sense will limit the EMI (Electromagnetic Interference) noise issue. Can you hear EMI noise? Yes, if it is loud enough. It sticks out like a sore thumb if you can do an A/B system test. There is plenty of research to support this. There is also plenty of research which indicates you may want to limit your exposure to EMI. There is a push in Europe to place limits on EMI exposure for humans. There is plenty of research showing you can use it to control brain function. Brain washing. haha

If you get the chance to hear a system with full range shielding covering the DC up frequency range you will either hate it or love it. It seems some brains cannot process the information with pleasure in full range shielded system. I discovered this from experience and I don't know why it occurs. For this effect to be maximized, the equipment design must be for full range shielding. I know of at least one reviewer of full range shielded cable where the reviewer states he misses the noise in his system. hmmm To each his own! Celebrate it, don't bother arguing.

This is a link to some information on shielding in the Audio Union collection. Do you want your equipment to withstand the electrical and magnetic effects of a nuclear explosion, I can do that do for a small fee. Haha, not that it would do you any good unless you are Doctor Strangelove.

@hilde45 I checked the book you mentioned, interesting summary. It turns out, finding real science these days is more difficult than ever. It is basically a can of worms and the cards are stacked against you.

If I remember correctly it was Fahrenheit who stated something like "you need a scale and a method of quantizing a point to know something about a subject". That is science in one perspective.

Real science is information I can use you to write equations to find a "solution" to a "question" within a mathematical system. This is using established science. When you do research you may take data points and look for an equation for predicting a "solution surface". When you can find real world solutions within an accuracy of 5% or greater you can be pretty sure it is real science. Once the same solution is duplicated by more researchers then your confidence goes up that you have real science.

The problem in science is mostly related to hypocrisy. The book "Around the World in 80 Days" makes fun of this issue. But here is a real world example: the wrong head was associated with a dinosaur in textbooks for more than a 100 years even thought it was widely known it was the wrong head. It is not uncommon to see real science scoffed at by the science elite and you will see these science elite intentionally misled people including students. Whaaatttt? They will also call you a "flat earther".

This is an example of Democrat and Republican science with a big dose of hypocrisy and intentional lying from Doctor Fauci and crew. Nearly everything regarding Covid you hear or see is inaccurate in oh so many ways inside the United States. Talk to your personal doctor, don't trust the aforementioned ACTORS. As soon as you expand your information source to the rest of the world you have access to more accurate information. BTW, part of my news sources were censored after January 20, 2020 again, a Democrat is in office. This is a problem with people who can not stand free speech, which limits real science. Hmmm

Oddly enough you see exactly the same types of conversations on this forum and others related to audio. Hmmmm However, when I have a user like @stringreen ask for information and @stringreen makes statement like "I find shielding closes in the sound" I know for sure in which direction to advise @stringreen. You need to remember the idea is to enjoy the music and not let science get in the way and I would  advise @stringreen to give a listen to Anticable's products. But I just used my knowledge of science to provide advice to a user which hopefully will increase the pleasures of music. That's the way it ought to be.