I have very few SACD or DVD-A discs and I don't play them very often. Tonight I was listening to Pink Floyd DSOTM SACD and Eagles Hotel California DVD-A and noticed something odd. Let me back up first: I manually calibrate my 990 using the internal test tones and a RS SPL meter. I have a variety of settings: L & R are at -7, C at -3, Surrounds at 0. However when listening to the discs noted above I had to adjust the calibration to have all five channels virtually the same. Otherwise, the C and surrounds were really loud and the L & R were almost gone (seems appropriate with my settings). Am I missing something on the 990 setup for 7.1 (5.1 in my case)? Do you need to adjust the calibration for 7.1 playback? FYI, my speakers are all 4 ohm, all set to small, 80Hz crossover and the subwoofer is "on". Seems odd I'd have to make such a radical adjustment. Any thoughts?