An in-ceiling M3, installed 52" above the plane of the ears, projects a pristine disc of sound from its tweeter, onto that plane, that is 5 feet in diameter. So if you're sitting right under it, the area 2.5 feet all around you is getting illuminated with linear highs.

The sound actually projects much wider than that but it becomes less linear as you move further out.

The mids and lows project even more than the highs.

The diameter of the disc grows in direct proportion to the height of the M3. With 11 foot ceilings, the diameter is 10 feet.

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