I've been experiencing hiss in my 950 as well. It can be heard from several feet away, however it only occurs with certain inputs and certain degial modes.
Examples:
CD analog - hiss
CD digital (optical)with CD player on - no hiss
CD digital (optical) with CD player off - hiss
DVD digital (dolby 5.1) - no hiss
DVD digital (DPLII) - hiss
Video2 (TV with analog + DPLII) - hiss

This hiss comes from both my left and right Active/40's, as well as from the rest of the channels which is connected by my 5 channel amp.