Speltz sent a sheet with the cables that says "Shunting capacitance is about as low as an interconnect can get (RCA less than 10pF/ft). This is due to the topology of the elongated spiral ground wire, with a straight conductor passing down the middle (at close to a 90 degree angle from each other). Because of this offset angle, the magnetic field of the ground wire has limited coupling to the signal wire (keeping capaicitance low)..."
Hope this helps.
Hope this helps.