I have enjoyed and been informed by the previous posts and a couple of questions come to mind. When I calibrated my system I set the 990's volume at "0" and used the manual test tone function to set each channel at 75db. I have tweaked a couple of individual settings (up a db or two for example) but nothing drastic. Now the questions based upon a simple condition: playing a CD in 2 channel mode.

1. When I play a CD using Upsample at -30 on the 990 volume I get 80 to 85db at my prime listening position using my SPL meter C weighted and Fast. At -20 I get 90 to 95db; Discussions above about volume settings of -10 to 0 make me think noise induced hearing loss. I imagine there might be some variability due to individual systems but do my results when playing a cd seem reasonable to you guys?

2. When I adjust the left or right channel a db or two in stereo or other 2 channel mode I can hear a difference in the location of the stereo image. I can easily tell that it moves left or right. Since I can hear the change is the 990 truely changing the calibration for an indvidual channel by a single db or am I missing something?