Quick questions; I was reading the online manual and noticed that you can bi amp using the Front A connection along with the Surround Back connection. Since I have a 7.1 setup with front highs using the Surround Back connection, is there anyway this receiver allows you to bi amp using say the Front A and Front B connections to go to the 2 front speakers? Or can I switch the front highs to use the Front B connection and then bi amp the 2 front speakers to the Front A and Surround Back connection?
Also has anyone tried the bi amp feature and if so, how much better was it? I've thumbed thru some threads and some people mention it doesn't do much, but I guess it depends on the receiver or other settings, and its probably the same by using better connections and speaker wire and plug into receiver normally w/o bi amping. Or just buy a separate amp, which to some is not truly worth it.

I have the Def Tech 8020ST (l/r), 8040CS (center), and 4 ProMontors (sl, sr, fhl, fhr). After finally setting it up and running thru the Audyssey, I did notice the surround left and right were much better and louder than what I had before with my Onkyo 609. I assume its b/c the Audyssey Multi EQ XT setup was far superior to the Onkyo 609 Audyssey EQ only. I know when I setup the Onkyo 609, I was using an SPL meter and set the surrounds to @ 75hz, but I'm wondering if I would have just increased the amount to say 78 or 80hz, would it have sounded as loud and as good as the current Marantz SR6006?
Also, after Audyssey setup, it placed the sub at 26 ft or something like that, which is way off. I assume you have to go in and manually update that value to the actual sub distance yourself. I have the Velodyne EQ-Max10 and it has it's own calibration mic to the sub directly. I forget but should I setup the sub calibration first and then setup the Audyssey with the sub calibration or vice versa? Lastly, does it matter what volume the sub is at when doing the calibrations?
Thanks in advance!