What are some of the things to know about biamping? I am considering this but do not know very much about it.
I need info on the active xover and what not.
If anyone is interested I have drawn-up 6 illustrations of different bi-amping options. Some illustrations are with an active crossover. I really did it for my own understanding, but if you would like them I can send them to anyone. They were drawn in Autocad, but I will send them in .pdf format unless you have ACAD. Pdf's require adobe reader which is available free.
I use a Outlaw ICBM to combine SA220's (monoblocked) to woofers, mid/tweeters with a ML9. Seems to work fine.
You need a crossover to equalize the gain/volume on differant amps and set your crossover freq/slope.
Just gives you more toys to play with.
MikeL makes some great points. I use two EVC ultimate attenuators in my biamp setup.

But I think in this case it really makes sense to go for the active x-over since you really do want to filter out the bass freqs going to the 300b SET amp for the tweets since your available power is fairly limited.

That should increase your dynamic range allowing for higher max SPL.
If going for the active bi-amping the thing you need to keep in mind is the woofer x-over freq and the slopes of the high/low pass filters of the speaker's built-in x-over. What type of speakers are you planning to biamp?
I am sorry guys that it took me so long to get back to ya.
I have klipsch khorns for speakers, so power is not really
an issue. It's more about what I need and the options I may have. Thanks for all your help. BTW my room is small.