from the man behind the curtain at evidence audio (whose cables are "directional"): ----- Original Message ----- From: To: <firstname.lastname@example.org> Sent: Wednesday, March 27, 2002 11:13 PM Subject: RE: cable directionality physics The short answer is that there is nothing anyone in my "camp" can say that will please the skeptics. Their idea of the scientific method requires proof measured on a screen or related to a physics model they'll find in a text book. Honestly, the audiophile community hasn't provided sufficient data to back their claims. "We" cable makers & users & listeners, are satisfied with a less rigorous (yet valid) scientific methodology: We listen to a conductor one way vs. another repeatedly and chart our results... one way being preferred over another... hence validating the existance of a difference and the need to pay some attention to it when making cable. Now this approach is "plausible psuedo-science" at best when viewed by the EE community, and I don't have ammunition to argue at a level they want to take it. We can SEE a directional shape in the crystalline structure of drawn copper, and oxides DO form between the crystals, and perhaps there is some diode rectification that occurs rejecting RF interference in one direction vs. another... but this is really just speculation. The difference IS pretty damn small. A larger difference for directionality in cables deals with the shield being attached at one end, to bleed off interference picked up by the shield to the chassis ground of the equipment with a lower ground potential... such as an amplifier with a 3-prong out plug stuck in an outlet... as opposed to a guitar. There's no denying that noise (electricity) will find a quicker path out of the cable towards one end vs. another.