Fiio rc balanced cable calling all balanced output enthusiasts the new rc balanced cable from fiio adopts a 25mm 4 pole plug with its separate leftright channel wires and separate signal transfer the rc balanced cable enables balanced operation for your earphones when connected to a balanced headphone amplifier such as the fiio am3 fiio rc balanced cable can greatly enhance channel separation as well as markedly increase the signal to noise ratio this results in a wider soundstage a