Here are the 2 notable pages from the manual: http://webpages.charter.net/fryguy/Picture.jpg http://webpages.charter.net/fryguy/Picture002.jpg Specifically I'm looking to bi-amp a set of components -Bandpass a set of mids 80-3000hz -Highpass a tweet 3000hz (or make it separate from the bandpass 3000 if possible) Also I'd like a more detailed analysis of what items 12,13,16,17,18,20 do. I sort of understand it, but a detailed explanation would be useful I think I figured it out, please verify this: tweets in front channel, mids in the rear. -set 3 to HP -set 2 to 3000 -set 12 to internal -set 13 to lp -set 15 to 80 -set 16 to hp so the front tweeter channels are highpassed to 3000, the signal is passed through to the rears internally via #12, and flipped to lp via #13. Then 15 and 16 combine to also apply a high pass filter at 80 to the mid. Is this correct? this still leaves me in the dark about why there are 2 hp/lp/ap switches on the rca outputs.