Opinions Needed: Active or passive pre

I spent years dabbling with both passive and active pre amps. Based on my experience, no matter what you buy, or what you spend, it all boils down to the following: passive pre amp lose some of the "kick" in the music, that an active design preserves. On the flip side, most active pre amps suck when it comes to preserving those minor nuances and harmonic details that you learn to love, after you've experienced them. Unless you can afford an ultra expensive active, you will have decide which of the above aforementioned charactaristics you treasure the most.

I would like to try passive preamp, but need the extra output for my subwoofer. I am using a Audible Illusion L1 and Janis sub. My Spica speakers run full range. Any suggestions?

Get a Rel sub, you can run it off the outputs of your amp {it actually sounds better this way} See the Rel web site for more details

The adcom 750 has two sets of outputs. Also has a passthru to run your home theater or tv variable outs into it.