The basis for the Coppertone RCA interconnect is a very simple but very effective form: a tin-plated copper shield, helically wound around a thin-walled Teflon tube.
The jacket is a multifilament nylon yarn, while the conductor is a pure copper solid-core element that is formed into a “nami” (wave) shape in order to ensure that it is substantially suspended in the air dielectric within the Teflon tube. This “air suspension” allows for quite low capacitance and quite high velocity.
The RCA connector is a REAN NYS352G (made by Neutrik), utilizing gold-plated brass contacts – fairly common metallurgy at this level, and in the Copperzone interconnect it has nothing to apologize for.
The Black Cat CopperZone carried the signal beautifully, the musical instruments kept apart and separated, vocals sitting central and in their own black space, carrying feeling and emotion out of my speakers to my ears. Sound-stage remained open and wide, depth front to back again allowing the instruments to sit in a proper stage like formation. I’m very impressed and these represent a welcome addition into the system, they seem to have an easy synergy with my equipment. Simple cymbal strikes have a crisp timbre and have good hard edge, yet with an extended delicate decay, not slipping into a shushy, slushy sound, though hard sounding speakers may not suit this level of detail, a very accurate portrayal is what we get. Bass is tight and tuneful, not fluffy or indistinct. It keeps the timing and rhythm like a metronome, and brings a real boogie to the party. - HiFi Pig