thinking out loud here; If the unit's mentioned are a single ended design using balanced just adds more in the signal path, circite to convert from single ended to balanced and back. if you don't need balanced for long runs it maybe better single ended. ie RCA.
MBL C31 C51 Interconnects?
I was wondering if anyone knows the technical reason MBL recommends RCA connections vs XLR connections for these units? I am guessing MBL engineers think it sounds better? But why? Just curious....