MattSPL said:
If you don't believe mains cables work, or won't even try them, that's your loss.
wireworlds cables are unlike other power cables in design. They have been designed to act as a filter, much like a passive mains filter in an extension block. Mains electricity operates at 50/60hz, the wireworld cables have been made to filter out noise in this frequency range. So, although wireworld are unique in their design, there's your scientific explanation.
Is this an April Fool post? If not I assume you meant they are designed to filter out noise outside this frequency range, if not they would filter out the power itself.
However, as I've pointed out endlessly, there will be a bloody great electrolytic capacitor in your equipment's power supply that will filter out any high frequency noise that gets to it so, whilst I'm in favour of having the cleanest possible power coming in, it's hard to see that removing something in a cable, assuming it works, that will be removed a couple of inches later in any case is going to make any difference.
Chris
PS Interesting that their website declines to say what "scientific principles" make the cables work.