Note that the amount of hiss in 'analog' input mode is directly effected by the amount of channel trim 'boost' or 'cut' applied in the "Channel Calibration" or "Channel Trim" menus. Boosting the gain to "+10" in that menu makes the hiss much more noticable, to the point where I can hear it clearly at my listening position,15 feet away. This might help explain why some people are hearing more hiss than others.

SO....try to keep the settings at "0db" or below if possible. If your power amps have input gain controls, use these to set the sound level to 75db using pink noise test signals, while keeping the 950 channel trims at "0db".