A good friend and (audio dealer) of mine likes to do a great demo when one of his customer's asks about a power cord recommendation for some of his tube gear.
With the music playing, he simply walks over and uplugs the preamp power cord, then the amplifier power cord. Then he leaves them unplugged for a good 30 seconds before re-plugging them. The music doesn't change a bit, and this is on some VERY high dollar SET tube gear and some $45k speakers, so resolution is not an issue.
It is a striking demonstration of the fact that if your gear is engineered with a properly (some will argue overbuilt) designed power supply, the power cord simply does not matter.
I would also note that unless you do have a dedicated and purpose-built audiophile line, then the electricity will have to travel through many feet of $1 a foot Romex in the walls before the electricity makes it to your $150 a foot power cord.
With the music playing, he simply walks over and uplugs the preamp power cord, then the amplifier power cord. Then he leaves them unplugged for a good 30 seconds before re-plugging them. The music doesn't change a bit, and this is on some VERY high dollar SET tube gear and some $45k speakers, so resolution is not an issue.
It is a striking demonstration of the fact that if your gear is engineered with a properly (some will argue overbuilt) designed power supply, the power cord simply does not matter.
I would also note that unless you do have a dedicated and purpose-built audiophile line, then the electricity will have to travel through many feet of $1 a foot Romex in the walls before the electricity makes it to your $150 a foot power cord.