Well I can take a stab at boomy. I set up my M22s on a window sill. Behind them is a 36 square foot pane of glass. Hit the loudness button on the Denon receiver and the M22s are "boomy". At moderate volume it can be like a gentle punch in the chest every few heart beats. I never get this kind of boominess from the M50's in the living room. What was missing in that review was any demonstration of awareness of the second most important element in the system, environment.

Mark