Can any RCA cable be used as a digital coax or does it have to be a 75ohm one?

[tesarpa]

How about vice versa scenario: using a pair of 75 ohm RCA coaxial cables for analogue audio interconnects?

This works fine.

 

[arjuna93]

This works fine.

Any reason to prefer regular RCA over 75 Ohm though? Why I ask is that I have an old but top quality 6N silver Ortofon component video cable which is 75 Ohm terminated with RCA. I don’t use component video, but I could use it for analogue audio + SPDIF coaxial (as there are three cables).

Not that I don’t have high quality analogue interconnects, but those are all PCOCC or alike copper, not silver.

 

[tesarpa]

Just try it. Only your ears tell you.