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

What did the video show you? I saw how to make an antenna. Did the RF picked up by the cheap cord affect the sound? Why do you assume I've only had 1 set of cables and never tried others? Noone told me anything. You jump to a lot of conclusions. 

You're asking why is a power supply different than a cable?  I didn't  notice anyone mention water but you. The power supply effectivly stops RF getting in and out with electrostatic screens between the primary and secondary in the transformer. As long as the power cord is of sufficient quality to provide the required current to the component that's all you need. 

The cable could "starve" the component which would affect the sound but I don't think anyone would want to go that route or shouldn't. Rejecting interference I don't get since the main is filtered by the components transformer and capacitors or should be. 

Read again. 

Don't fall for the red herring of "all that romex and junk" the power goes through before you get it. All that came before it is moot since what you need to do is get the best you can from where it all terminates: the outlet.

This is just beyond me. Nothing matters but the power cord from the receptacle to the component? The panel box,  wire in the wall, transformer in the component that isolates the primary from the secondary, filtering in the component none of this makes a tinker's damn only this freaking 4 foot power cord?? Jesus Christ people  learn how electricity works. 

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ecircon.html#c1

Would the power cord be in a normal setting in a new house assuming it's up to snuff ? Do these special cords only work in old houses? 

Aren't you sweet.💋

There is no sense in talking about theories of operation if we can't agree that there is an audible effect.

You don't begin with the conclusion but a premise. This is circular reasoning or putting the cart before the horse. 

The power cord is not the last 6 feet, it is the first 6 feet from the perspective of the component. As stated in #1 the local current and electromagnetic effects directly affect the sonic performance of the component.”

This statement is idiotic the component has no "perspective" , it can't differentiate between a 6 foot cord or a 50 foot cord. Current isn't local it oscillates all the way back to the power station. This is another conclusion,  he hasn't proven it affects the sonic performance just states it as fact. 

NOT EVERYTHING THAT CAN BE COUNTED COUNTS, AND NOT EVERYTHING THAT COUNTS CAN BE COUNTED."
- ALBERT EINSTEIN.

Then end with a false attribution to a quote is sloppy research. 

https://quoteinvestigator.com/2010/05/26/everything-counts-einstein/

Headphone cables might have some triboelectric noise unless you sit very still. In modern not vintage ( over 30 years old) electronics  RF interference is mitigated by any competent power supply. 

Here’s the best place to start, select electricity and magnetism.

http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

what we do know is that power cords can and do have a big impact on sound 

We know nothing of the sort. IF power cords affect sound then whatever causes this is measurable. There is no escaping this , this is actually something we do know. 

and his posts make no sense.

Figured out how to do those measurements yet? 

phd,  You made a statement of fact,

what we do know is that power cords can and do have a big impact on sound

All I was saying is this is an opinion "we" don't know any thing of the kind.  If this statement is true then the reason for it is measurable, the power cord has some anomaly.  

but what we do know is that power cords can and do have a big impact on sound whether it’s negative or positive

So , this a classic example of begging the question, I answered one with another.

We know nothing of the sort, he's assuming the truth of his conclusion. 

The speaker causes the amplifier to work harder not the minimum resistance of a cable as long as it's rated for the job. Anything 12 awg or less should be fine up to 25 ft. Cars are DC which is why they typically use very large guages of wire. 

I have no idea who your friend is but where I live I don’t see line amplifiers on transmission lines every 50ft,  poles are more than 50 ft apart. That would be an amplifer on every pole??

The few feet of power cord filters electricity about as good as your garden hose filters water. 

Actually a fuse is not necessary for the amplifier to work it's a safety precaution. 

If a fuse modifies the ability of the amplifier to amplify the input then the amplifier is broken.

Once the noise floor is beyond a humans auditory perception does it really matter if it gets any lower?

We can measure the amount of noise and distortion from that "ocean" and once those measurements show us it's not audible by humans then I don't really see the point of making it lower. From an engineering perspective I understand the desire for more and better but from a listener perspective it's not that important once you can't hear it. Unless you have very poor performing components the speakers will have the most distortion of anything else anyway.

IM or intermodulation noise can be reduced below human hearing. Once the random noise floor reaches these levels of -160 dBFS  in a DAC noise from amps, speakers etc.. swamp it. It isn't audible to humans , dolphins maybe. 

The Benchmark DAC3 offers extremely low levels of harmonic distortion from all its outputs. Intermodulation distortion was similarly vanishingly low."

"No power-supply–related spuriae can be seen, and the random noise floor lies below –160 dBFS!"

"When the DAC3 decoded dithered 16-bit and 24-bit data representing a 1 kHz tone at -60 dBFS, the increase in bit depth dropped the noise floor by more than 30 dB, indicating that the Benchmark’s resolution is at least 21 bits."

Make sense? No
This is about power cords music doesn't propagate down power cords.

I was talking to noname he's the one who brought up pseudoscience not you.

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

That was a good YouTube by Rob Watts. Thanks for the link.

Andy2 what's the impact  of the distortion spectrum on the relevant noise floor?

Ya. No music along the power cord but idea is the same. No?

No.

You believe consciousness is outside the body, dualism. 

Interesting about the Stradivarius. Read about a test they did with master violinists who picked the new violins as the best sounding over the Stradivarius when they didn’t know which one was playing. Trust your ears not your eyes.

https://www.livescience.com/44651-new-violins-beat-stradivarius.html

Yes, it was a magazine article about research on consciousness done at the Data Science Institute at Columbia. It isn't like a music review magazine. The idea the brain creates consciousness isn't something new as you point out. The that the brain creates consciousness is our modern day working theory it isn't the old paradigm but our continuing paradigm. . It isn't something buried in old textbooks that noone takes seriously. 

Well this working hypothesis is now looking at 3 specific regions of the brain that bring about consciousness. It isn't to create some nefarious post human society but in the hope of being able to bring someone out of a vegetative state. I don't look for points of victory just logic and rationalism. Granted a thread about uber dollar power cords affecting the sound of music is a strange place to look for it. 

We already know the brainstem is likely responsible for arousal, awareness the other prerequisite for consciousness we're not so sure of, but if arousal is in the brain then that's where we look for awareness. 

If you have a tuner with a reception meter, you can try this yourself. I did.
https://youtu.be/DC0s6KqQz3g

I tried it about 40 years ago it's how we made an antenna to get FM stations late at night. You might do more research the reason the other two wires weren't good antennas is they were twisted wire. 

Brain dont create consciousness, except in very old science textbook....

Sometimes I wonder where you get these notions?  Very old textbooks?


https://www.sciencedaily.com/releases/2019/05/190501153354.htm

Sound in a physical sense exists without a listener. Need to quit viewing everything from an anthropomorphic lens.

Where else would you look for consciousness but the brain? Certainly not the liver. 

From a purely physical standpoint falling trees move air creating waves of sound whether anyone is around doesn’t matter. From a psychological view when those waves hit our ears and the brain processes the vibrations we turn and see where the tree fell. So the answer to the age old question is yes and no depends whether you’re talking about physics or human perception. When we test gravity our notions don’t enter the picture. If I believe I can flap my arms and fly I’ll still fall like everyone else who tries the experiment. It’s universal not relying on my subjective view of gravity but the objective reality of it’s force. Likewise with cables, they have measurable physical properties and they will vary not only from one type of conductor to another but within the same type of conductors. Are these differences perceptible? The only honest way to answer that question is to listen and see if we can tell and the only honest way to do that is when we have no preconceptions or biases. Since all humans are afflicted with these preconceptions and biases we control for them to get answers that are more like the gravity experiment where what I think doesn’t affect the outcome, we all fall.

You're not the first to post that video I've watched it a couple of times. It just doesn't tell us anything other than how to make a good antenna.