I'm a big fan of Ultimate Cables, the level of detail exceeds all other IC's I've tried. Deep taught bass and a good sound stage. Both of my systems are wired exclusively with Ultimate C4's. Excellent bang for the buck.
Some of the Zu Cables use a "silver alloy" but my guess is that it would be copper and silver. Their Varial and Wylde interconnects, Ibis and Libtec speaker cables, and Mother and BoK power cords use it. I just put Wylde, Libtec, and BoK cables in my LP-based 2-channel system and like the results very much--lowered noise floor, more dynamic extremes and nuance, more transparency, more fully fleshed out tones, and better rhythm and timing.
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