I never really questioned the settings using the 990's test tone until I tried DSOTM SACD and Hotel California DVD-A, but now that I look back they were odd. M&K speakers went through a pretty rigorous testing protocol and it seemed weird the center was so much different. I know the room and speaker placement can have a huge impact, but my L,C, and R are placed in a similar fashion. The L and R are about 3 feet away from the side wall thereby minimizing the side wall effect.

If Altec's farm is safe, I'd suggest the limited band pink noise from the various calibration discs (DTS, AIX, or DVE) may be a good source of sound to set up HT speakers.