I wondered about this when I used them last night. My initial impression was is this aac? I have an iPhone currently so I have no way to know for sure. But i felt the same about compression and dynamics. They do sound very good and remind me of my other chifi hybrids. They are bright but not piercing. Bass is tight with little bleed. I’m not going to complain about them too much for 40 bucks. They are a fun purchase but probably won’t get a ton of use unless I can solve the volume problem. Overall I would rate the sq on par with Powerbeats pro. Better in some respects and worse in others and different in tonality. For 40 bucks they are worth a flyer but don’t expect to have found your endgame.