Power cord? Why?

"Also, the greater voltage drop in a wimpy power cord does not translate into degraded sound provided that the power supply is robust."

So, show me one amp which has a "robust" power supply. I have never run across an amp yet that did not benefit from a low-inductance power cord, except those that have inductors already in series for filtering (bad idea IMO).

Seans guidance on the power cord construction is very good. The star-quad achieves the lowest inductance. Multiples of them will be very effective.

I would be wary about using "high-temperature" wire. The copper in these is usually sub-standard for audio purposes, as is alarm, telephone and control wire. Find a good Alpha or Belden hook-up wire with pTFE insulation.

Iasi - what type of power amp do you have? Does it have an AC input filter?

Audioengr.... OK. Where do I buy #14 hookup wire?

By the way, why does the power cord have to be "audio quality"? It only has to pass 60Hz. Besides, audio is AC, and the power gets rectified, so any "audio" characteristics of the AC get lost.

I have no idea if it had an AC input filter...the amp that I tried the experiment on was Innersound ESL amp into a pair of Innersound Isis speakers...I wanted to see for how long will the speakers play if I remove the power cord from the back of the amp...it went with no problems for about 10 seconds...the sound faded away in about 15 seconds...

I'm going to agree with Eldartford.
The whole power cord marketing scheme is smoke and mirrors.
You're invited over to my house to prove me wrong.
I live in an Akron, Ohio suburb with nice clean power at, most of the time, 60Hz with a nice looking sine wave.