6, I'm not familiar with your receiver and you haven't described the provisions of your sub, so it's difficult to make suggestions. Most receivers have a provision for using both the mains and sub simultaneously(called "both", "plus" etc.). Although I generally use my M22s without a sub, experimenting in a different setup showed excellent results with the M22s "small" and the crossover 80Hz. Possibly your receiver crossover on "small" is too high, but I'm just guessing.

-----------------------------------

Enjoy the music, not the equipment.