good discussion on power cords

"First of all, power cords do not transmit audio signal - unlike speaker cables that transmitting audio signal."
"The power cord soul purpose is to transfer the power from the wall outlet to the equipment".
"How is the last few feet of cable can really make a difference?"
A few quotes from the video that are completely misleading.

The late Charles Hanson once said that an amp is basically a modulator of the power supply.

He also has another video that says expensive speaker cables do not make any difference

That does not make what the late Charles Hanson said an accurate analogy, but I think we can state pretty unequivocally that the goal of the power supply is to isolate the output (audio) from the input as best as possible. One thing you don't want to do it "modulate" the AC into the audio. Technically the diodes in the power supply perform a modulation function on the incoming AC which is why you get DC.

Not to offend, but IMO - If you have a $10K amp. properly matched with your pre amp and speakers and it takes a $2K power cord to make it sound good, - I'd ditch that sucker and buy an amp with a decent power supply and save yourself a couple of grand......Jim

but I think we can state pretty unequivocally that the goal of the power supply is to isolate the output (audio) from the input as best as possible.

I would disagree with that statement.  There is really no "isolation".  They are all related.

Technically the diodes in the power supply perform a modulation function on the incoming AC which is why you get DC.

I think that is called "rectificatioin", not "modulation".  

With regard to the "Audioholics" vid, I actually agree with most of what he said on his other videos, but he probably is wrong with respect to power cable.  

I just finshed 2 DIY power cords, Pure copper ends with Home Depot 12 gague copper strand wire. AWESOME!!. can be seen in my latest YT upload. 
Type in SEAS Thos.
I made 2, one for the big Jadis, 1 for the 220 V cayin cdp, and have another set of ends comming from china, 2-3 months ship time. 
a  spool of 12 gague strand costs $15/50 feet.
Just really super cord. Feeds the Jadis and cayin all the juice either can drink up.
the basic 50 cent cord that comes with any unit you purchase (I bet Jadis's $100K JA800, comes with,,yep a  Fifty cent power cord, cut any one open on your system, its either 18 or 22,22 gague wire,,,a  few hair thin strands. 
Go ahead, try it, you will see.
Go to youtube type in SEAS Thor, my latest vid will pop up. Beats any power cord on the market. 
Copper wire in my wall, copper ends, copper 12 gague stranded, = pure raw unfiltered 100%  juice.