Thanks for this interesting review, and I totally agree with all what you are saying. I actually find that the P9 excels with music files where my other headphone, the HD800S, is failing. The HD800S most certainly is unforgiving to low quality files, the P9 is generous with them. The HD800S is totally unsuitable for any type of metal/punk music, and the P9 loves it. The HD800S is dry and analytical, and the P9 is fun orientated to save the day in the subway. Well, also one is closed and the other one open. The complete opposite