If you have passive subs, you will need an external electronic crossover (and stereo amplifier) to do this setup. The Outlaw ICBM will accommodate stereo subs, but I beleive that it has a fixed crossover frequency of 80Hz in it's stereo sub mode. If this crossover frequency is OK with you, you might give investigate this.
I assume this is what you mean by "bi-amping"........
[This message has been edited by soundhound (edited April 14, 2003).]