Question for Atma-sphere, will expensive power cables improve your amplifiers?

Regarding the optimal power cord, one of the manufacturers (I seem to remember maybe Steve Nugent with Empirical Audio) used to say that Romex would actually make a pretty good power cord and that twisted 10 awg THHN would be better since twisting would reduce inductance. It seems twisted THHN in conduit would make a good in-wall wire for a dedicated line.

Chris at VH Audio offers his star quad 12 awg x 4 (stranded copper) bulk power cable because the star quad geometry reduces inductance even more than with a twisted pair.  Reducing inducance is a good thing for power cables and speaker cables.

My DIY 1M long power cables feeding my amplifiers also have a star quad geometry using four runs of 10 awg NOS Western Electric tinned copper wire for an aggregate total of 7 awg per pole.  Ground is also 7 awg.  I don't lose sleep over voltage drop.

With my experience an expensive supposedly good power cord used for an amplifier gives you a little bit more power. I would not say that it really affects the sound quality, either in SS or tubes. 

I finally bit the bullet and bought the long delayed power cords for my good stereo system. I have long believed that power cables make a difference as I’ve heard the difference, but deciding on which ones to buy is not so easy.
I’ve been delaying this purchase for years for fear of foolishly spending too much money on “snake oil” cables. Finally, I just couldn’t stand the mess behind my system any longer, All the cables were too long, crossing each other, coiled to shorten them. Most stock power cables are five or six feet long. With one exception of 54” all my cables should be under three ft. I finally decided on Iconoclast because I know for sure they are well made, and that!s important. But the other reason also has little to do with sound quality. It’s because I could get them to the exact inch I needed to reduce clutter, crossing power cords,and coils of excess power cords.I know of no other cables that can be ordered by the inch. Now all my power cables are no longer touching any other power cables (or interconnects) and I don’t need cable lifters because they are all off the floor because they are the right length. Whether this improves my amplifier I can’t say, but I can say my system does sound improved for every source.

Why is solid core wire illegal in a power cord?

@immatthewj They can be a significant fire or shock hazard for the reasons @61falcon and others laid out.

Why are you asking 'opinions' about power cables instead of just asking what science and physics say, with quantifiable facts. POWER CABLES DO NOT CHANGE SOUND. Shame on anyone who says otherwise and perpetuates the marketing lies. I'm amazed there aren't laws protecting customers at this point.