The power cord does not matter. You will see zero improvement from it. The AV8801 has a great power supply that's more than capable of removing the noise shown on the oscilloscope plot (assuming it's an actual before and after plot which I'm pretty sure it's not). Don't take me the wrong way, I respect others opinions, but this is AV Science after all. Well, I guess psychology is a science...
On a brighter note, I finally re-bought that AV8801 I sent back to amazon many months ago since they sent me the wrong unit (was an amazon warehouse open-box deal that didn't even have an AV8801 in it!?!). Seems the new a-stock price has dropped significantly from a certain seller on ebay, making the AV8801 an even better buy. However, you guys have me worried with all the pictures of fans above your AV8801. I was hoping it'd run cooler than my Onkyo did!?!
I do believe that in science if you change a variable you change a result and until you've done your due diligence and tried different power cables on different pieces of gear and found them to your liking or not, your point is of no value to those that have indeed found a more than significant improvement for the lack of a better word of course . Science is what it is, a study of fact (which indeed vary and change) and is not an absolute in terms of what we poor ,misguided and not able to hear or measure what a machine of our creation does humans! but neither will that machine always get the interpretation of what one may consider right to his or her ears. Perhaps in time we can feed the measuring gear more data to get closer to the complete picture of what we indeed do hear , process and interpret what is good sound, until then I will do as I have always done and that is just listen and decide
welcome back to the club