For your guidance, I have copied and pasted information from Ayre's webpage regarding fully-balanced and single ended signals.
Kindest regards,
N
Fully-balanced Circuitry
Balanced circuitry is a special dual configuration that rejects noise and interference—not only from external cables, but also from the AC power line itself. In an Ayre component even the signals from conventional sources are converted to the balanced format, resulting in vivid, lifelike performances, presented against an uncannily quiet background.