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The result of this is the virtual elimination of the main causes of distortion in every digital audio set-up. 3. OPTICAL OUTPUT Use this socket to connect to the input of a separate DAC or digital recording machine. Use a high quality fibre optic interconnect cable designed specifically for audio use. 4. DIGITAL OUTPUT This coaxial output is for input to a separate DAC or digital recording machine. Use a high quality 75 ohm BNC interconnect cable for this connection (not one designed for normal