You're talking about horizontal bi-amping. Does work pretty good. Back when I was running a similar configuration I found that vertical bi-amping did offer some improvements. For that, you only need the one set of outputs from your CD and run a single cable to each amp. Then use a good quality splitter at the amp to drive both inputs on each amp. You would then attach one channel on each amp to the low end on each speaker and the other channel on each amp to the high end on each speaker.
Good luck,
Dan
Good luck,
Dan