Best Pre-amp for Bi-amping?

Levinson 32 has two balanced (XLR) and two unbalanced (RCA) per channel. I don't know rest of your stuff, but it is the best I've ever heard in my system (all-ML & B&W).

I have a conrad-johnson pv10a. I biamp using mogami rca y adapters available for $10 from my local audio store. I emailed c-j and they said this should work fine. I probably lose some resolution, but for my system it seems to work ok. It is a cheap solution to try and see if you like it. Paul

I'm in the same situation, and I'm currently using Y adapters in my biamp setup (passive biamping, by the way). I guess I'd get some improvement with an active setup (though I'm a bit worried about altering the internal crossover that was built precisely for these speakers), which would allow me to lose both the Y-adapter degradation and having to send full range signals through each biamped channel. However, I'm biamping primarily to give more juice to my speakers (and at the same time, getting the benefits of biwiring, not true biamping). I'm surprised that more manufacturers don't cater to biamping. I thought it was just my quandry...