In my uncorrected living room with v4:

M2OW: low 6

M2OW with sub: high 6

M2 bookshelf: high 6

M2 bookshelf with sub: low 7

M3: 4 (boomy and fuzzy mids)

M5 bookshelf: mid 4 (boomy)

M5OW: high 4

M50: mid 4 (fuzzy mids)

M100: 3 (kabooooom!)

Active LFR (no sub needed): 8; high 8 when turned up.

Of course if speakers are too low and two 'nad widths apart, no matter how well designed, they'll sound like a 1.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated