RDL HR-DAC1 Digital to Analog ConverterThe HR DAC1 is the ideal choice in installations requiring high quality analog audio from an AES EBU, AES 3ID or S PDIF digital audio source. The HR DAC1 automatically detects a valid input on any of the four input jacks: S PDIF optical, S PDIF coaxial, AES 3ID or AES EBU. The AES EBU input is 110 ohm terminated the S PDIF coaxial and AES 3ID jacks are 75 ohm terminated. A front panel LOCK LED indicates the presence of a valid digital audio source