Finally got round to plugging in the SR7500 and unfortunately the MRAC didn't want to know. Passes the Ambinet Noise - Okay - Does the speaker level -Ok Does the speaker size - OK but when it gets the distance it says Speaker Set Error which according to the manual - Speakers not set correctly. I've checked them again and seems fine, I also noted that in the manual it says sometimes fails on speaker distance and to set manually. I'm wondering whether this was because unfortunately in my room my seating position is right underneath my rear three surround speakers. I even tried moving the MIC further forward but it still fails which is odd. Any ideas.....?? Have set things manually for now but somehow I still feel something is lacking.