Oxidized connections (and cables) are insidious. I had very good cables before, but after quite a few years I changed (same grade, just new cables and connectors) and there was a certain "haziness" that disappeared. The change was motivated by length, not by sound. But once I heard the difference, I opened up a great length of my old cable and I could see a much higher level of oxydation than I would have anticipated.

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