Many people in the head-fi community disappointed by the new denon lines, music maniac. But i think the other way.... well, initially when i got mine, the design  and presentation was jaw dropping, but the sound signature was horrible, it was bright and harsh treble with muddy bass. After burn-in them for 10 hours the treble settle a bit but the bass was still sound muddy.  After 40 hours burn-in, it was totally different headphone,wide and airy sound stage, smooth treble, and strong bass. I  can dare to compare to many high-end headphones.   ...