Again, if we're talking best practice... S/PDIF specs 75 ohm coaxial cable (that's why it's called coaxial digital!) are you going to be able to tell a difference? Maybe, maybe not... but from audiophiles who are worried about what direction their electrons are trained to face - this is one REAL specification that is cheap and easy enough to adhere to. 75 ohm coaxial with shield continuity, pretty much the exact same standard as composite video. Signal level is 0.5..1V over 75 ohm conductors - why save a buck or two and mess with that?!?
In a professional situation for AES/EBU, we use twisted pair 110 ohm cable for a specification.
Bren R.
