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. 
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If I manufactured an audio component and knew for a fact that a better power cord would improve the sound of my component why would I not invest in the cheapest part of my component to improve my sound for the consumer.
If I manufactured a car and knew for a fact that a better tire would approve the performance of my car, why would I not invest in the cheapest part of my car to improve the performance for the customer
Why?  Because you have to sell your product.   First a buyer has to believe your product is worth at least what you are asking.  Second, the more you add cost, the more the retail climbs, making it harder to sell and harder for the buyer to justify the cost.   Third, no matter how much a power cord improved the sound, there are folks out there who won't believe it and aren't willing to spend more bucks for something they don't believe helps.  Fourth, it is one thing to buy a quality line cord that is mass produced, UL/CSA approved, and is independently tested safe; it is another to make a better line cord in small quantities that adds another 100 bucks to the retail price.   It is impossible to compete with economy of scale in manufacturing - that is a factory making 5000 line cords a day and you in your small factory struggling to make quality audio gear at 10 pieces a day.  

As for the car / tire improvement, one manufacturer was sued a few years back for doing just that.  They chose a 3 season tire that clearly outperformed the 4 season one but was sued when the owner crashed during wet weather.   All cars today are sold with all season tires, just for that reason.