Here is a bit of my upcoming review:
Midrange: While I would say there is a very nice balance to the Music One, the midrange is the focus of the sound, and it has a nice blend between thickness and clarity. Comparing with the similarly priced ER4S, the Music One presents with more detail and yet also is more musical. The midrange is on the mid-forward side and the presentation space isn’t extremely large, at least unless the FSM-02 V2 amp is used, which really synergizes will with the Music One. Integration from top to bottom of the frequency spectrum is well done, and the overall midrange performance is excellent.
You can read more here.