I was setting up my new B&K Ref 50 last night and have a question for you veteran owners. I went into the speaker setup menu and did the calibration test. The front, center, and side surrounds all had a loud level of pink noise shot to them. The back surrounds had the pink noise but it was at a considerably lower level. I turned the back surrounds up to their +12 maximum and they were still several decibels lower than any other speaker at the +0 level. I am not sure if this is correct. Any advice or suggestions from other Ref 50 owners would me greatly appreciated. By the way, the unit is firmware revision 1.03.