Build a Faraday cage around your equipment.

Most pieces of electronic equipment that has a metal outer case or cabinet already has the principles and all the protection of a Faraday cage. There is no problem to solve here. There is nothing in your home that will be affecting that gear that is solved by doing anything such as creating another Faraday cage around the gear. All the gear we are talking about is created by electrical engineers who have a very complete understanding of all of this from about the second day of school. Unless you are living in a power transfer station and your stereo is 3" under a giant transformer or something, there is no issue :-) 

 

Phone Faraday pouch

One reviewer (5th on down) mentioned that this Faraday pouch blocked radio cell signals but not Wi-Fi. Thought I heard somewhere that Wi-Fi might be more problematic than radio for sound systems.

A somewhat easier solution

 

https://www.amazon.co.uk/dp/B09N3Z1KQ8?ref_=cm_sw_r_apan_dp_PBY6M77NMY4ZVGFZK47W

    It's been around 25 years years or so, but: I found 'TI Shield', made by Texas Instruments, on page 14 of Michael Percy's catalog.   It's still in his catalog*, though out of production for decades.

    Placed a full coverage sheet on each component's shelf and on the top (under the granite, to shield the turntable), of my system's cabinet.       

                                       Haven't looked back since.

     Just seemed/seems to me that the most immediate threat of interference, would be the EMI/RFI created by the components themselves.

                            *https://www.percyaudio.com/Catalog.pdf

I dont say my homemade invention and recipe is better than a technological well done shield...

But i designed my own shield, which did much than just shield,for my ears... I used it on very critical location as a router... Or a main electrical grid box.. Or around my amplifier and on top...

I called it my "golden plate"... Some people laugh at me but i laugh last as it is the case sometimes ...😉

I used shungite plate doubled with copper tape and for some location near the amplifier some minerals as quartz etc to tune and balance the result for my ears... ( i am proud because all my devices are homemade or low cost one which i modified)

 

 

http://*https://www.percyaudio.com/Catalog.pdf

The pubicity page 14 describe it as such, i underlined the words of interest for me ;

«TI SHIELD: Unique composite shielding material from Texas Instruments for blocking EMI & RFI interference. Conventional
shielding materials excel either in electrical conductivity or magnetic permeability, but not both. Steel is not conductive enough
to be effective at blocking high frequencies, while copper and aluminum are not effective at absorbing low frequency EMI. No
single material met both of these requirements until TI developed this copper/alloy 49/copper composite material. TI Shield is
effective from below 10Hz up to 10GHz and is currently available only in .014" thickness (28-29ga). Counterpoint utilized sim-
ilar technology in construction of their chassis’ and found significant audible benefits were to be derived from surrounding audio
circuitry with materials that shield against both EMI & RFI. Unlike Mu-Metal, this material may be cut and bent into conven-
ient shapes without requiring annealing to restore its shielding properties.»

 

Shungite and copper complement each other for my ears..

https://www.researchgate.net/publication/349372455_ABSORBERS_OF_ELECTROMAGNETIC_RADIATION_BASED_ON_SHUNGITE_SPECIES

«The results of the interaction of EMR with samples of materials of absorbers and the dependence of the transmission coefficients on the angle of incidence of electromagnetic waves (EMW) in the frequency range 5.3-10.6 GHz are obtained. Research in these frequency ranges is crucial and relevant with the development and transition in the future of systems and mobile cellular networks of promising generations to higher radio frequency ranges. The use of powdered shungite for the creation of EMR absorbers in ultra-high-frequency radiation (UHFR) range has not yet been studied enough. Technological values of the selected EMR absorbers in comparison with other geomaterials: strength of stone-like shungite species, high indicators of density (for example, 2.61 g/cm3 – “TS” brand; 2.49 g/cm3 – “TK” brand) and mechanical resistance, high thermal and chemical stability, low cost, good mixing with binders. The test samples provide a decrease of EMR level due to the presence of absorption effects.»

 

Anyway shungite had other very useful side effect:

https://pubmed.ncbi.nlm.nih.gov/14968159/

 

And people can call it a placebo effect or not, i dont mind, because i never bought anything to create me embeddings mechanical, electrical and acoustica controls, except very low cost device as 10 bucks Schumann generator i modified... Ok i bought a ionizator and did not modify it thats all.. 😊

I modified even my headphones with complete success, but i disliked them all even after modification but not the best of all of them the K340 i loved it completely AFTER my modification ...

 

i say that to MOTIVATE people and say to them : learn HOW to trust your ears... Dont upgrade FIRST , buy low cost and create your own listening experiments... You will laugh listening many costlier audio products after it, because there exist a minimal threshold of sound satisfaction and an optimal threshold .. The difference in cost between this two threshold is huge...The difference in perceived specifics acoustical factors is way less than you think between these two thresholds ...

 

Price tag WITHOUT acoustic basics learned by the owner is often  rubbish... Most of the times...and if not useless for those who cannot afford 20,000 bucks amplifier etc...

Audiophile experience for the INFORMED poor is possible, i own it...With speakers/dedicated  one time now with headphone...