As I understand it, the point of the gold is that it doesn't corrode, so you never have an oxide layer on the outside, interfering with the connection between speaker / amp and cable.So possibly if they'd left the mains wire there for ten years, the sound might have gone downhill a bit by the end. Or maybe not... But the guys who were doing the test were fairly serious studio engineers, not half-deaf live sound engineers, and they set up the blind test carefully then sat there with clipboards marking which cables they thought were being used on a wide range of different bits of music, and the end result was pretty much random. One of them thought that the only pattern was that they tended to think that slightly more trebly music was coming through the expensive cables, whether it was or not.
As I understand it, the point of the gold is that it doesn't corrode, so you never have an oxide layer on the outside, interfering with the connection between speaker / amp and cable.So possibly if they'd left the mains wire there for ten years, the sound might have gone downhill a bit by the end. Or maybe not... But the guys who were doing the test were fairly serious studio engineers, not half-deaf live sound engineers, and they set up the blind test carefully then sat there with clipboards marking which cables they thought were being used on a wide range of different bits of music, and the end result was pretty much random. One of them thought that the only pattern was that they tended to think that slightly more trebly music was coming through the expensive cables, whether it was or not.