Thanks for these info. I am glad you confirmed that the bass is not far from the Z1R, I was expecting this. I might upgrade at the end of this year for now my shortlist is (Monarch mk2, Mest mk2, Z1R). I might start with Monarch mk2. Cant imagine the Z1R or Monarch mk2 with the right EQ... must be end game
Regarding the highs on the FH9. I actually use green filters with slight push in EQ, they sound very impressive, sparkly and airy. They are not harsh at all. Only problem I had with FH9 was with the shouty upper mids but that is gone now with right EQ. If the trebles are also close to the Z1R then we have to admit the FH9 is a masterpiece as is getting that close to the Z1R classic.
Hoping the next FiiO's hybrid flagship will reach even higher in terms of quality while the price remains D D