My take is that some power cords tend to deliver more lower frequencies than others,more bass sounding.
Some power cords can roll off the top,while some seem to amplify it, and sound edgy.
When I say the power cables sound bassy or edgy, I mean the gear plugged into it takes on that sound.
Because all music is, is a bunch of different frequencies.
Full range speakers will reveal more frequencies than small mini monitors.
Perhaps those with gear that don't cover a lot of frequencies are less aware of tonal shifts which to me are affected by filtering or enhancement of certain frequencies by our components and the connecting wires.
Solid core wire "sounds" different than stranded copper, silver sounds different and different guages or thicknesses sound different, as do different wire configurations.
Even so, it should be easy to hear the differences in power cords, wires, with mini monitors as with full range speakers.
Clarity can be enhanced with different power cords, could that mean that more frequencies are flowing thru one cord as opposed to the other?
I tend to feel that, all components really do is alter the frequencies of the music.
And music is just a bunch or frequencies, strung together in a pleasing way.That's why we like some gear and hate others.
We like the stuff that pleases our ears and the frequencies we are comfortable with.
We don't want highs that lead to fatigue and we don't want sloppy boomy bass frequencies.
All of us, over the years,have developed a "house sound"and anything that deviates too much from that comfort zone isn't loved for very long.
We tend to replace one thing with another that does the job better than the last.
Some time we do scrap it all and start over, but we do develope sonic memories over time.
In other words we know what we like, we just want more.
If you beleieve all power cords sound the same,or more correctly, can't alter the sound of what they are connected to, then none of this makes any sense.
Amazing how that 60hz of electricity can be persuaded to give us so many more freqencies to enjoy isn't it?