What do we hear when we change the direction of a wire?

I would believe whatever differences there are would show up most in cases where there is an impedance mismatch which is much more likely with zero feedback amps, but that should not really matter if one has addressed impedance matching between amps and speakers properly, which is the right way to do it for best results, so in that case impedance matching issues due to a zero feedback amp is a moot point.  

This would be virtually impossible, since impedance is variable with frequency across the audio band, impedance of speakers are not complex, and not controlled anywhere within the speaker itself. Given the mechanical nature, it may not even be a practical goal.

Who “listens” to electricity or electrical characteristics/properties? Sound is created, or in this instance recreated, by a vibrating transducer(s); how is that movement measured objectively/scientifically? 
I am definitely in the camp where “everything matters”. I have no idea how some of the tweaks I’ve incorporated work, or even if they do. If I “notice” a change over extended listening +/-, perceived or otherwise, the answer is quite clear. 

@anton_stepichev, you really need to get your facts straight!

I never wrote this quote that you are assigning to me. In fact, when I do a search on those exact words on this forum, the only person who has posted them is YOU. As you used the words, "STATEMENT", that implies you were directly quoting me. You were not directly quoting, and if you think you were paraphrasing me, you are not.

anton_stepichev OP77 posts04-24-2021 1:50am
dletch2, you haven't finished explaining your previous statement yet:

"The interference of a power cable can get into the signal circuit and become audible not as periodic interference of 60Hz harmonics, but as non-periodic one so that initial frequency of 60 hz is perceived as something related to a musical signal (for example, frequency response), and not as interference or noise."

THIS IS THE EXACT WORDS I USED!!!   There is nothing to explain in this. This is electronics and signals 101. Anything I have written is only muddy to you because you do not understand it. I can't help you on that. We are obviously not working at the same levels.

This is not an advocacy for expensive power cables, but there are many ways the harmonics in the AC to get into the signal. Whether they do or not is a different question. The most obvious one is via the power supply, especially in a low feedback amplifier. Primary power supply harmonic is 120Hz, but with all the linear supplies, there are harmonics at many multiples of that frequency, certainly up to several KHz. Those big transformers audiophiles love get rid much of the really high frequencies.

Those high current peaks from the power amplifiers generate harmonic noise on the AC line that can get into other power supplies.

Those high current peaks can generate higher frequency EMI that can get into signal lines (at least a justification for shielding).

I don't see a lot of justification for the cost or claims about most high end power cords. Most of these power cord / cable designers have little knowledge of electronics which is evident in their claims. It works because their customers do not either. Vicious circle.

That 60Hz buzzing is not always just 60Hz. It is only something that happens 60 times a second. There can be rich harmonic content in that 60Hz buzz.   Now that take 60Hz and harmonics and modulate a music signal with it. Now you have stuff all over the place.

Dletch2, no one is interested in rereading an infinite number of quotes and analyzing them. I've definitely covered up a question that you didn't answer directly by engaging in abstract demagoguery. I apologize that it looked like a direct quote.

Dletch2
THIS IS THE EXACT WORDS I USED!!!

In your direct quote, there is nothing like a logical analysis of the possible occurrence of audible distortions in the signal circuit when changing the power cable. I have to repeat, in order for your words to be at least somewhat similar to the evidence, you must provide:

1 - numerical or relative estimation of the level of possible interference
2 - numerical or relative estimation of the level at which the interference penetrate the signal circuit
3 - In what exact place it penetrates the signal circuit

On the same points you have to explane your EXACT statement, that you made not long ago:

Dletch2Does not work that way. If the error is simply frequency response, the relationship between the perfect and imperfect signal never changes...

So, first of all you should explain, how the difference in frequency response can occur when a short piece of wire is reversed?

Numerical or relative please.

Mahgister, I am giving you the benefit of the doubt that you understand that this does not mean that humans have "magical" properties.

dletch2 i am giving you the benefit of the doubt that you understand that all my posts in the last 24 hours related NOT to magic but to scientific fact demonstrating the little we know about the limits of humans sense system and the way in which this sense perceptive power is related affect us...

Pitch is still tone, as it is a definition and it is continuous, it does not involve attack and decay.

What you called a "definition" and by that you means something purely arbitrary or subjective WITHOUT connection to a deeper reality is discontinuous when played on an instrument producing with it his own timbre experience...And this listening experience of pitch is the usual one by musicians....

Then a pitch is not an abstract continuous tone played by a machine....This reduction betrays the acoustical condition of his human experience...pitch always implies decay and attack, or a playing vibrating particulat timbre of an instriment in concrete musical world because it is a human perception....Isolating from his experience its associate frequencies is correct at the condition to keep the baby when you throw the water....The fact that pitch to be distinguish from noise must be associated to some continuous frequency dont means that all there is about pitch is this condition...

Instruments can time two waves of the same frequency to way better than 1/4 wavelength.

Here also our fundamental different perspective create complete misunderstanding....

Accuracy by a measuring instrument is not accuracy for the listening ears/brain...

Reducing the second concept of accuracy to a the narrow technological window of the other tool is good research BUT does not replace investigation in the specific power of the human ears...The human ears use his own tool, non linear one, and many part of the brain and body are sollicited by the act of hearing.... The fact that instruments can time 2 waves better than human refer to a pure numerical concept of accuracy.... The ears do it his own way surprizingly it seems but this ears accuracy serves " an evolutive and semiotic goal " which is completely alien to our own measuring tools....

Then dont let your techological ideology which consist in the downplaying of anything meaningful to be pure "accident" or pure material phenomenon...

Or called someone like me who dont reject science but refuse to be materialist a magician like you already did in a pejorative way.... Consciousness is a primal, original, irreductible phenomenon, without which there is no facts, and which itself cannot be reduced to facts....



But you are the audio professionnal not me.... But i speak my tought at the risk of being wrong....I dont think i am wrong here with these general observations...