Quoting the Bryston manual:
"All Bryson amps use bicolor LEDs with green indicating power on and red indicating actual overload or distortion. If the LED indicator contains substantial red content, it should be considered as a sign that the level is too high and may cause speaker damage if it continues...."
"The clip-sensing circuit uses an AC comparator to detect any souce of signal distorion including clipping, short circuits in cablig, excessive DC, or supersonic signal at the input or output. Most condition which could cause the red LED to light for more than a moment or two can be dangerous to your loud speakers and should be corrected immediately."
Perhaps the Bryton is not clipping.
I'm thinking the red LEDs are coming on because of distortion from the Pioneer. Thats why I want to try it with the Bryston pre-amp.

BTW, the system is for a 9000 cu ft room (24x36).