All of these relates to the 6ch external input,which supposedly a bypass[except the ever active lowpass xover]. Tone controlls are active Theater compensation is active. Speaker presence setting [I.E. center "none"] active. This however doesn't create a "phantom" center using the 6ch input it will discard this info. However when the internal DD DTS ETC.... decoding being used the mains create the "phantom" image[as it should] when no center was selected. This makes me wonder just how the signal is being routed from input to the output. I'm not complaining, marely observing,so if some of you can verifye this please do so here.