This is the most amazing headphone ever, I came from background of shure 535, westone w60 and beyren dynamic T6. but this small thing blow everything you ever heard.  the sound begins to be alive, has its definition, started to hear all my music again, because you can easily imagine the stage and people while listening,  changed to nozzle to bright and then boom, I cannot stop. connect it to anything and it will "repair" it, even to airline headphone jack "but with that piece which you can control the sound level, and relax or better "immerse"...