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Originally Posted by Juho L
I haven't studied this phenomena, but I think the change of resistance causes the quality dropdown. With expensive cables the shield and the signal wires are probably coated with something that doesn't become oxidized during time when the plain copper wires, which are used in the cheap cables, starts to become oxidized.
The oxidization causes a slight reasistance change in the wire because the electrons always move on the surface of the cable, so if the surface gets covered with coopper oxide there has to be some trouble.
That's my vision. Not sure about it though, but it seems logical.
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Yeah, it sounds fair! Btw, good description... =)