Please avoid using standard analog audio cables for digital signals. Even though they may look the same, they are not designed for use with digital audio and thus the performance will be compromised. We recommend the use of high quality cables at all costs. For SPDIF or BNC-WC cables, 75 Ohm high quality coaxial cable is recommended. For AES/EBU it is recommended to use 110 Ohm shielded twisted pair (STP) cables. Also as a basic rule, do not allow the length of Word Clock cables to exceed more than 6 meters.