You mean why there is no benefit of using SE215 balanced wired? Balanced output has two advantages - increasing a power (since you are sending 2 complimentary balanced signals instead of one referenced to the ground) and reducing the noise (since you are not referencing your L/R signal to one common shared ground). Also, depending on DAPs architecture, balanced output can improve L/R separation for a better soundstage expansion (especially in width of a sound). I don't have experience using Shure products, except for SE846, but in general SE215 doesn't need any additional power and it's not as sensitive or low impedance. Plus, as of now N5 2.5mm balanced output is not dead silent like AK100ii/120ii to begin with. There are other headphones that might benefit from balanced output, but not SE215. If you have your mind set on getting a replacement cable, go ahead. I didn't like SE846 stock cable and not sure if the same goes for their other budget IEMs. Just don't expect to hear any significant sound improvement unless you are getting silver-plated or pure silver or pure copper, etc. wires. That's where a sound upgrade going to happen - changing wires of the cable, not going from single ended to balanced.