4HT,

Try following the procedure described in the manual for calibrating your system. With all sources off, set the volume to 0dB, set the RS meter to C weighting, slow response and set the dial to 70. Go through the calibration menu and adjust the individual levels on all the speakers until the needle is at +5 on the meter. On this scale, the +5 will be 75 dB. This will be considered reference level using the internal test tones in the 950.

Let us know.