My " golden ears" tell me that a good power cord makes a significant if not huge difference.It is debateable if they make a bigger difference than the interconnects, but so as not to make an argument, I'll say they both make substantial differences. I would like to thank our in-house boy genius, Sean, for getting me a start in the right direction regarding good cables. I have no regrets storing my stock power cords in the closet.But system synergy is crucial.Once you've decided on your electronics,experimentation with power cords,interconnects, and speaker cables is recommended and fun,if you're a true audiophile.One of the nice advantages of this website, Audiogon, is you can buy a good used cord and if it doesn't work in your system, you can re-sell it on this same website to another fellow audiophile and try another one. I love this hobby.