Supra Dual is an Interconnect pair-cable for analogue line applications, such as signal source to preamplifier connection. The Supra Dual Design Supra Dual is designed for noise immunity and for best musical performance. The Semi-balanced connection configuration enhances the immunity to electro-magnetic interference. It means that the screens are connected to earth at only one end of the cable, so there is no signal through the screens, but they serve only as screens. The earth connection is at the end where the marking text starts. Connect the earthed end to the sorce device. Besides the good shielding properties of the Aluminum foil, the cores are symmetrically twisted to avoid the magnetic pickup. The Dual cable is a fast interconnect of low capacitance.