Yes, Balanced in these terms has nothing to do with audio or EQ, its a term to describe the signalling layout.
Using a balanced or earth free signal for audio in a car (or any electrically noisy environment) is going to give better result as the chassis/ground is full of horrible electrical noise and is not going to improve matters if it forms half the audio circuit.
330i gone. 335i gone. E63 gone. M6GC current...