For use with balanced output amps.</br>1.2 m cable?? 2.5 mm 4-pole plug?? based on the FiiO RC-SE1</br>Can be used with FiiO X7 AM3 amp module.</br>Compatible with Shure SE215 / SE315 / SE425 / SE535 / SE846?? as well as other brands.</br></br>Product Description</br></br>Calling all balanced output enthusiasts. Based on RC-SE1?? the new RC-SE1B swaps the 3.5mm jack out for a 2.5mm 4-pole plug. With its separate left/right channel wires and separate +/- signal transfer?? the RC-SE1B enables balanced operation for your earphones. When connected to a balanced headphone amplifier?? RC-SE1B can greatly enhance channel separation as well as markedly increase the signal to noise ratio. This results in a wider sound stage and more controlled?? textured bass - perfect for balanced output enthusiasts. A little extra transparency makes for a lot more indivi