Digital coax connections use 75-ohm cable; digital AES/EBU connections use 110-ohm cable.
In principle, the both of these paralleled assemblies should have lower than optimal characteristic impedance. (To answer your specific question, the dual assemblies should have one-half the characteristic impedance of their single run counterparts.)
In practice, however, both provided better
SQ than a digital cable having the “true” characteristic impedance. I don’t pretend to understand the underlying theory for this result.
In principle, the both of these paralleled assemblies should have lower than optimal characteristic impedance. (To answer your specific question, the dual assemblies should have one-half the characteristic impedance of their single run counterparts.)
In practice, however, both provided better
SQ than a digital cable having the “true” characteristic impedance. I don’t pretend to understand the underlying theory for this result.