Thanks vangor for pointing out my typo because the FR & FL are actually vertical and I have edited my post above. I was highlighting their alignment to indicate why the FR & FL have a 3db difference in calibration from the center. The rear switches are set for the fronts at "L/R" and "Center" for the horizontal center speaker. These switch settings also create the calibration difference I believe. Since I'm correcting myself...I also verified my LCRs now have their crossover set at 60Hz instead of 80Hz. I must have changed them recently in one of those "fine tuning nights of music". I can't help with your Audyssey problems but my understanding was that a difficult acoustic situation was where Audyssey helped the most. I can tell you that proper calibration is very critical and makes the entire system shine by having all the speakers create a cohesive sound stage. Any stronger or weaker speaker setting throws the balance to one spot. How long have you had the LCRs? Curious on your thoughts once they are burned in and calibrated.