in theory a digital cable may have a higher nominal impedance than a conventional rca audio cable; the extent to which you can hear the difference is another matter. i've used 75ohm digital cables as a 2ch audio interconnect (and likewise used a rca cable as a digital interconnect) with no ill effect; i do understand that the differences are more perceptible in video applications.
Can a 75 ohm digital rca cable be used in place of a regular rca interconnect?
I have a Harmonic tech digital cable (copper) thats not being used. Im using a blue jean rca cable from my receiver as a preamp to an external amp for a center channel. This cable is of more quality but not sure how these type of digital 75 ohm calbes work in place of a regular rca cable.