Difference between 75 and 110 ohm digital cables?

If buying an rca digital cable from transport to dac what are the differences between these 2 types of cables?

rsf50711-12-2020 7:21pm

kijanki Details Discussions Posts This discussion Message User 4,428 posts 11-12-2020 at 07:46pm Copy Comment URL Report Comment Edit Delete 75 or 110ohm is characteristic impedance of the cable. It should match output impedance of the transport and input impedance of the DAC. In audio most of the time single ended connection with RCA or BNC connector is specified at 75ohm while differential one with XLR connectors is specified at 110ohm.
audio2design Details Discussions Posts This discussion 1,351 posts 11-12-2020 at 07:34pm Copy Comment URL Report Comment Edit Delete 110 is the spec for balanced connections. 75 would be typical for single ended , i.e. RCA