This is my first post to audioreview though I have been a long time visitor. Best website regarding home theater!

My question is regarding my Polk CSi5 center speaker. It has the ability to bi-amp, though I am unable to find any receivers that have such an ability. I currently own the Denon 2807 which has a/b for the front left/right. A specific model of Marantz has caught my eye, the 8500. I noticed on the back it has what they call a "Multi-Speaker 'C' Output". Would this receiver have the ability to switch from Surround Back (as labeled below the banana plugs) to a bi-amped center channel connection?

I'm also deciding if I should purchase seperates instead. I'm not very familiar with pre-amps, do they provide the ability to split a center channel into high and low frequencies for a bi-amped connection? I could very much bi-wire the connection, but I own a 200w max rated speaker; I'd like to use it to its fullest capabilities.

To those of you with much more experience, i'd like to hear your opinions and help me decide which road I should take.