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RE: Yes...

Cobra Cable

Cobra Cable was sold by Polk Audio many years ago but has long since been discontinued. The idea was to reduce the cable inductance but in doing so, increased cable capacitance. Cobra wire had many separate strands that were individually insulated with a thin material. These all ran in parallel and comprised one conductor. The insulation was colored black for one group. The other conductor was a similar group of strands but the insulation was colored red. The strands of each color were interwoven with each other and formed a braided but cross-coupled two-conductor cable. Of course, the strands being very close to each other and with thin insulation, resulted in an unusually high cable capacitance. The high capacitance of Cobra Cable was the same as connecting an unusually high value capacitor directly across the amplifier terminals. Reports indicated that a resistor-inductor termination could be added to prevent oscillation when this wire was used with unstable amplifier designs that cause transient overshoot and even amplifier oscillation.


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