What do you want to know? I was not using my surround back channels, which are the zone 2 or surround back on the 2803. I set it up exactly as explained on this site in the 3805 review. It works perfectly. Now the L/R main is driving the tweeters and the Zone2 amp is driving the woofers of my monitor 7's I set the volume of the Zone2 a little lower than the tweeters, because according to the rives audio cd test tones and my handy dandy SPL meter I had some humps from 120 to about 350. Now I have achieved the flatest response I think I can get in my room without doing more treatment and a 3805 with the EQ.