just a guess here but it seems to make sence...if there is any sence to be made spending big $$ on power cords. In an article i read about using the house electric service to run computer network signals they indicated that they put that signal into the higher frequency range since the noise on the system resides in the lower frequency. My guess is that some of the high end cords are acting as high pass filters to some degree so that the noise is removed before it gets to the amp. A longer cable may increase the efficiency of the filtering?
