Quote Originally Posted by E-Stat
According to engineers with whom I've spoken, the main villain targeted by aftermarket cords is noise generated not hundreds of miles away at some power sub station, but hundreds of feet away inside your home by computers, fluorescent light fixtures, refrigerators, digitally controlled appliances, and even inches away by digital sources like CDPs. All of which generate RFI that is transmitted through the power line and ultimately through the audio components. Good electronic components will happily amplify the noise along with the signal.
Not always, most engineers are smart enough to put broadband filtering in their designs. However, this is a different topic than what the poster was after. Certainly, if you can positively identify a souce of interference causing degradation of your equipment's performance, a proper solution should be sought. If it is a radiated problem, a filtered power cord may not help at all, or be only a portion of the solution.

BTW - you can make a cheap rf choke by sliding a cardboard tube over your powercord and stuffing it tightly with steel wool. The fun part is keeping the cord in the middle of the assembly whilst stuffing away. Then you can cap off the ends and slide the whole assembly up and down the cord to see where it has the most effect.

My method? You mean hearing deeper into my music? Discovering subtle details for recordings that I've heard hundreds of times before? Reading a book on EE theory will tell me more about the harmonic structure of a piano? Don't think so.
No, but a book on acoustic instrument physics might.

-Bruce