I suggested the "high gain amp" theory before. My Parasound needs 1.2V input for full power output at maximum gain settings. The 950 puts out 6.3V max, but S/N for the 950 is taken at a much lower output. By turning the Parasound gain pots down to about 1/2 of max and setting all 950 trims to 0, I have a very loud output at +5 on the 950. Normal listening is at -10 on the 950. In all cases, hiss is not heard from more than about 2 inches from the tweeters.

When I turn the gain pots on the Parasound all the way up, hiss is noticable in the system from about 3 feet away at all volume levels. At these amp settings, I can only listen below about -15 on the 950, any louder and my ears would bleed. Yet the hiss is present. This leads me to think that the amp must be matched to the 950. Just turn down the amp's gain (if possible).