Bi-amping + speaker crossovers = redundant?

NO! The crossovers determine how much power each section of the speaker gets, if you have no crossover the tweeter and mid gets as much power as the woofer, a sure recipe for disaster. What you are looking for is an external electronic crossover which attenuates the signal before the amp sees it. You can also remove the crossover from the cabinet to improve the sound. Even if what you propose was possible the amps would require rebalancing every time you changed the level.

It certainly is possible but unless the speakers are two way then you will still need to leave part of the crossover in place.

Any decent external active crossover will also have volume control for the outputs so you can match everything up. Once you get that set you can change the volume with your preamp as normal.

Here is a link with a lot more info on biamping:

http://sound.westhost.com/bi-amp.htm

Mark

My speakers are two-way. My idea was to connect one integrated amplifier to the tweeters, and another one (more powerful) to the woofers. The article about bi-amping (thanks for the link!) does not seem to address such a possibility, hence my confusion.