chord shawline usb digitalAdvanced shielding, better sound Shawline USB Shawline USB is built using high quality, silver plated signal and power conductors. The power conductors are separately shielded from the signal conductors, and the insulation is a special hard polyethylene developed for high speed signal transmission. There is also an overall shield, so this combined with the internal shielding means that the signal cables are protected up to very high frequencies.