Good replies to your question. Sometimes in trying to understand the solution to a problem, like a better power cord can be...it is good to either understand or be aware of the problem. Of the many things that can be a concern with the AC power going into your components...the one that is easy to grasp is the idea of wire and RF. If a person wants to receive a distant FM station, it is best to put up a good antenna..., well, the huge amount of wire running through a home is much like a massive antenna for FM, AM, Ham, CB, ticks and pops from household electronics...let alone what is feed back onto the line from very powerfull motors on the furnace...and the list goes on. A line comming in...kept short for the stereo..is a great suggestion, one of the power plants, or the like is another good idea..and the power cord IS the last line of defense. I have had good luck with the high-end Nordost, but almost any upgrade is better than none. Best of success.