I actually would like to hear the monitor 5 headphones. I have a lot of respect for the speaker drivers developed under collaboration of Pioneer/TAD/Air studios. I wonder if Andrew Jones had a hand in the development of the headphones. Would not be surprised if technology was developed in house. The master 1 has an odd spike in the mid/treble. Has anyone seen the frequency response for the monitor 5? Some users have expressed really enjoying these headphones. Would not dismiss these without consideration.