I just set up my new B&K Ref 50 and have a question for any current owners of the Ref 50. I went into the speaker level calibration menu and the Ref 50 started sending the pink noise to all speakers. The front (Paradigm Studio 60s), center (Paradigm Studio CC), and side surrounds (Paradigm Cinema) all had very equal levels. The back surrounds (Paradigm Cinema) level was so low that I had to turn the level up to the +12 point. At this level it was still almost half the volume of the other speakers. I am using the B&K AV125.7 amp which does not have individual trim controls. I checked the wiring and it is correct. Am I doing something wrong? I cannot get both back surrounds anywhere near the level of the fronts or side surrounds. I think I may have a defective unit but I'm not sure. Any help would be appreciated!