Interesting. I find AS10 mixed bag reading different reviews. Some find it U-shaped but with well balanced signature and no annoying peaks. Some find it V-shaped with recessed mids and some sibilance in highs. Some find it intimate soundstage while some think it is average. Gear matching problem? Tips used? idk. While I`m starting to belive AS10 is best KZ has done... I just don`t find it appealing reading reviews. Same here. Best cable I`ve ever used, BQ & SQ wise. After changing jack it measures 0.2 Ohm. Waiting for my ZS4 too. They look gorgeous and shape is best I`ve ever tried.