Originally Posted by Madmax67
Tighten the mic pattern up when you rerun Audyssey. Stay within a foot or so of the first center of head mic position then fan out from there to each ear location, the next 3 a foot or so in front of those first 3 and the last 2 a foot above the first 3. Basically a small bubble around the first distance and level setting one but no positions taken behind the first one. Also stay about 18 inches away from any hard boundaries and if you can't then lay a blanket or pillow over the hard boundary before taking the measurement.
Originally Posted by jdsmoothie
Nor should you. In your case, the mic positions should be placed inside of a semi-circle going forward of the 1st mic position (instead of a full circle around the 1st mic position).
Gentlemen, it's been a few days since I last posted an update on my issue. I wanted to take enough time to work the problem and learn as much as I could before coming back here. And now, having spent hours calibrating and recalibrating, tweaking and retweaking, I feel I haven given it all I can for now.
I ran the calibration Madmax67 suggested with meticulous care. Following the calibration, I made some adjustments to Audyssey. They're as follow: Dynamic EQ is ON (with 0dB offset), and Dynamic Volume is ON and set to Medium. I didn't make any manual adjustments to any of the room correction values derived from the calibration, such as the distances, dB levels, crossovers, etc.
All that effort brought me to this conclusion: Turning on Dynamic Volume makes the single-most improvement to the overall volume level, but the initial problem of volume loss is still very much there. This is dramatically demonstrated when I switch the sound mode from one of the processed modes to Direct or Pure Direct. The volume drops from loud to almost imperceptible.
There is an additional symptom, one which I noticed quite early on but chose to not mention until I was more sure of what I was hearing. The sound quality of the receiver has also changed. I'm not sure exactly how to explain this, but sound seems "thin," missing the fullness that was once present, and extremely shrill. I can tune some of this out with Audyssey, of course, but it's still there when I turn off Audyssey.
And therein lies my concern. Something does seem very different with my receiver, and not in a good way. Maybe I'm being overly concerned. Maybe there are some other things I can do try to diagnose the problem and abate it. What do you think?