The Master Set optimizes the interaction between your speakers and your room. . . I thought my Mahlers sounded already good as I had 'set them up' by my own self. I was kindly disabused of that notion. While there is nothing magical or Newagish about the entire process, in effect the final result is quasi. . . Magical.
Yes, it would appear the Capri is extremely extended at both ends. Not sure if you could classify it as 'tuby' in the midrange though. I cannot detect an emphasis of midrange fundamentals per se or of subjective 'warmth' that I would not be personally wild about. Rather, I am hearing more harmonic texture than I am used to, which subjectively to me sounds 'musical'. The Capri I have in the system right now is apparently straight out of the factory. . . . how it will sound after 500 hrs of stout breakin can be only left as an exercise to my feverish imagination.