... abit confused: how does a power cord affect the presentation of sound...

https://www.avsforum.com/forum/173-2-channel-audio/3061980-rob-watts-dac-design-other-audio-musings.html

It is an interesting video...

He speak about you can hear the difference between noise floor of -200dB vs -175dB.

Perhaps he knows his trade- off business.... :)

My own experince and experiments teach me that some pieces of minerals anywhere all along the electrical grid modify the sound coming from this modification of the noise floor... Discuss with him for brain resolving power in hearing .... :)

I put bags of beach peebles on the external electrical cable of my house and guess what that makes audible difference...

Rob Watts says that even adding a small electronic chips in a dac add noise that is audible by him.... He knows perhaps something....

I will let these arguments here.... I am absolutely not knowledgeable in engineering but i only want to speak about my simple experiments.... I use these experiments to improve my own audio system beyond all expectation.... Believe what you want.... I cannot change beliefs.... I am only interested in simple way too improve my system and it is working astoundingly at peanuts costs....All my controls methods are homemade and i had no scientific explanation for some.... 

:)

Hi @mahgister:

You are 100% right! Nobody can change their beliefs. They will Google the s%#*^t out of Internet to find pseudoscience stuff to support their beliefs. Or is it religion? And forget about listening or trying. They would do nothing of that if it goes against their beliefs. Even if it were free.

.... I cannot change beliefs.... 

«Science is not written in books it is written in nature only» - Anonymus geniuses in history, too many to be named....

« Our powerful ignorance is sometimes named technology»- Groucho Marx

I don't think you understand the meaning of pseudoscience. Why don't you Google it Einstein.

You are right djones.... Pseudosciences is not orthodox science, it is false or mad science or sometimes, but more rarely, not yet recognized future science.....

My affirmation after my own experiments that shungite+ copper work all along my electrical grid is not orthodox science, it is madness or simply an unrecognized fact for future science or engineering research....

:)

You can call me mad.... It is only my experience tough....And i was doing it for my S.Q. not for science for sure.... But how can a piece of shungite or quartz can have so opposite effect on an electrical field? Part of the answer is already  known science, perhaps something is lacking tough....