These entry level Hifiman headphone sound excellent with acoustic music, jazz, classical provided you use them with a proper amplifier - smartphone or tablet will not cut it.
It sounds a bit "edgy" with an Adioqiuest DragonFly 1.5 but sound great with a Schiit Vali 2++ and Audiphonics RaspiDAC streamer, beating my Massdrop/Sennheiser HD 58x as the best "budget audiophile" headphone.
The cable could be a bit longer and would prefer it was terminated in a straight rather than an angled jack (in particular because it is much better suited for stationary listening).