I had the same problem... some of my old Favourites are now saddening to listen to because they are flat and lack range. And it *is* just the recording/mastering.

Other CDs that I just "liked" before came to life with my M22s and are some of my new favorites. Again, simply becuase they are well mastered and sound GREAT.

snazzed

M22, VP150, QS8 <--all v2
Sub: Outlaw LFM1-Plus
Denon AVR1910, Sony X900-65"