Originally Posted By: CV
So the receiver basically figures out the speaker's sensitivity by the trim coupled with the distance settings?


No, the receiver (or more accurately, the calibration process) determines the trim based on the speaker's sensitvity and distance.

 Originally Posted By: CV
Calibrating at one volume level wouldn't really show the receiver the speaker's sensitivity, since distance would be a factor in the volume, right? So does it, in fact, use both trim and distance figures to create a curve for the speaker's sensitivity, or am I still missing the boat?


Again, it's not trying to figure out sensitivity or create any type of sensitivity curve, it's trying to determine the trim setting based on distance and speaker sensitivity.