understood, I have observed that audyssey pings are a fixed value and gains/levels are ignored when in calibration mode. The response is measured and derives trim levels to match all channels in addition to the EQ'd response. Audyssey techs confirmed this when I inquired as to what I suspected going on. So, with nothing else changed in the system, the L/C/R trims are now 4-5db lower with the SX-1000's vs. M25 as set by Audyssey. Whether or not my interpretation of the data is correct, that is what I have to report as a before/after.
When the windows are shut the sound is pretty well contained. I haven't had any complaints so far from the neighbors.