The 950's manual has a fairly good section on calibration. Basically, set the main volume to 00dB before entering the 950's menu, then calibrate each channel so that the test tones measure at roughly 75dB in the primary listening position. As an example, I think all of my speakers vary up or down 2 to 4 dB all the way around the room. The sub is a bit different, as the Radio Shack meter that most of us use behaves a bit oddly with low frequency measurements. I tend to do a fairly "rough" calibration on the sub (getting it to around 70dB or 72dB using the 950's test tone) and then tweak it to suit my listening preferences, but that's just me being a little odd...

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