Posted on 9th Jun 2011 @ 1:41 PM
Air, is, of course the best dielectric. Thus the theory of loose teflon being better would make sense. In a perfect world, the teflon would never, ever touch the wire. But since this is not the case, a loose teflon tube instead "leans" against the wire. As signal travels down the wire, any microscopic vibrations of the wire can cause a sort of rattling of the metal against the teflon. This is essentially how microphones work. Send that vibration to an amplifier and all of a sudden you have magnified a noise that was never meant to be part of the music reproduction. So we instead have the teflon directly factory applied to a very specific thickness (12 mils).
If, in fact, you want the cleanest signal- cotton is the best alternative. It surrounds the wire with air, without being a hard surface to cause additional noise. This is the dielectric in our DNA Interconnect, which is the best we have designed.