A vacuum is the best dielectric? Since this is not pratical would air be the next best dielectric or would there be a better sounding dielectric like cotton? Would there be a difference for speaker wire or interconnects? Thanks
Teflon (PTFE) is better than most, and found in Nordost and other high-end cables. Air separating the Teflon is better still. Certain [noncombustible] gases even more so.
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