Out of the box impressions:
The FD7's reproduction of believable instrumental timbre for the violin, cello, double bass, flute, trumpet, oboe, piano, and timpani really helps the illusion of live symphonic music along, as does the way the FD7 portray the time elements of music like tempo, melody, and rhythm. Vocals are wonderful and powerfully emotive. Driver seems to have very low distortion, as FD7 can play at very loud levels without my ears shutting down. The Bass response is very well controlled which gives me the visceral and musical experience.
tldr: Absolute coherent sound, all frequency range evenly balanced, detailed and tonally near neutral for my taste but not fatiguing.
As I put the FD7 in my burn in station, I am thinking "Where the heck do I go from here?"
Well.. nowhere. I think I am finally done searching for a single DD that I can live with and love for the long haul.