Why Power Cables Affect Sound

I just bought a new CD player and was underwhelmed with it compared to my cheaper, lower quality CD player. That’s when it hit me that my cheaper CD player is using an upgraded power cable. When I put an upgraded power cable on my new CD player, the sound was instantly transformed: the treble was tamed, the music was more dynamic and lifelike, and overall more musical. 

This got me thinking as to how in the world a power cable can affect sound. I want to hear all of your ideas. Here’s one of my ideas:

I have heard from many sources that a good power cable is made of multiple gauge conductors from large gauge to small gauge. The electrons in a power cable are like a train with each electron acting as a train car. When a treble note is played, for example, the small gauge wires can react quickly because that “train” has much less mass than a large gauge conductor. If you only had one large gauge conductor, you would need to accelerate a very large train for a small, quick treble note, and this leads to poor dynamics. A similar analogy might be water in a pipe. A small pipe can react much quicker to higher frequencies than a large pipe due to the decreased mass/momentum of the water in the pipe. 

That’s one of my ideas. Now I want to hear your thoughts and have a general discussion of why power cables matter. 

If you don’t think power cables matter at all, please refrain from derailing the conversation with antagonism. There a time and place for that but not in this thread please. 

I tried 3 Pangea Acc9 MKII cables and also an AC14 something and they all sucked the life out of my system.  Back they went to AA.I use the mid priced Shunyata cords in my system and am extremely pleased.
A plausible explanation is the upgraded cable is better at filtering out RFI/EMI from getting in or out of the CD player.
@stereo5 That was not my experience. It did tame what sounded like overly bright treble so maybe in your system the effect was too much if you were already happy with your treble. I would like to try Shunyata some day but I’m quite happy for now. 

Power cables, as with all cables, are highly tunable. I like starting with the basic wire and jacket and tune my way up from there.


Why would multi-thousand dollar components come without adequate power cables? In fact, presuming power cables do make a significant difference, why wouldn't a $5-10k amp or pre-amp have just exactly the right power cable for its specific design? Why would a component maker spend so much design and construction effort on a unit and then send it to you with a crappy cable? That would make me wonder where else they are cutting corners.