The above is a very thoughtful and informative answer.
Coax with a BNC termination will conform to the 75ohm S/PDIF standard.
I have been told by a cable designer (Rick Schultz) that RCA digital coax can come close to 75ohms depending on the design.
http://www.bluejeanscable.com/articles/75ohmrca.htm
Is a coaxial cable same as a SPDIF cable? Seems they are one in the same.The simple answer in home audio applications is yes.
Coax with a BNC termination will conform to the 75ohm S/PDIF standard.
I have been told by a cable designer (Rick Schultz) that RCA digital coax can come close to 75ohms depending on the design.
http://www.bluejeanscable.com/articles/75ohmrca.htm