Interesting. In my 2400 Cu Ft HT room, I've never found that my M22s with twin 10" Velodyne subs (used as their stands) ever ran out of breath even at the 0 Db Ref Level on my Denon AVR.

In fact, at 0 Db Ref Level, they are far too loud for my tastes & my aural health. Listening at -10 Db Level is much more comfortable & they are plenty loud even there...

TAM