OK, so i let them burn in for 5 days now. The first day right out of the box it sounded dull, dark en undefined, But right now the sound is cristal clear, stereo image wide and reasonable deep,the bass sounds exactly like it should be, the middle and high frequencies show their electrostatic nature, so sounds really natural and fast also, nothing to complain about. cons, actually only one the cables that the headphone came with, sound really like garbage. rightnow i am playing with a tiny cheap blue tooth receiver, can walk around within 15 meters of the source, so now the mj1 really opened up with the receiver, it can pay really loud without any distortion.
Finally some words about all the negative comments here.anumber of them i donot trust atall, imo they were just written from people that are only trying to destroy this massdrop offer, some are comments from angry teenagers. I advice people o be patient an run them in for minimal of 100 hours, pair it with good quality cables, or likei did go wireless with blue tooth, and you will be rewarded with imo high end sound