50 ohm vs 75 ohm is a transmission line technology concept... improperly applied to these very, VERY short lengths of cable.
Which means they generally do not conform (in situ) to the theory that is applied to them.
in such scenarios as this, the transmission is one of a square wave, and thus the leading and lagging edges of the square wave IS the 'information' in the system.
And that... is going to be subjected to more or less distortion, mostly due to cable construction over that of characteristic impedance (in termination), in some important ways.
So a given 50 ohm cable might perform better as digital audio cable vs that of a 75 ohm cable, in a stated 75 ohm termination on both pieces of gear. might, being the operative word.
Eg, our liquid metal digital audio cables have no conformation to any transmission line standard, yet they perform in the top echelon of RCA terminated digital audio cables. Different technology, different result.
Which means they generally do not conform (in situ) to the theory that is applied to them.
in such scenarios as this, the transmission is one of a square wave, and thus the leading and lagging edges of the square wave IS the 'information' in the system.
And that... is going to be subjected to more or less distortion, mostly due to cable construction over that of characteristic impedance (in termination), in some important ways.
So a given 50 ohm cable might perform better as digital audio cable vs that of a 75 ohm cable, in a stated 75 ohm termination on both pieces of gear. might, being the operative word.
Eg, our liquid metal digital audio cables have no conformation to any transmission line standard, yet they perform in the top echelon of RCA terminated digital audio cables. Different technology, different result.