bi-amping components correctly?

I'm in the design phase of my system and at this point, time is a luxury since $$ isn't. I've read a little on bi-amping and from what I understand it is the best way to achieve better SQ from your component speakers. This is what I think I have learned, bi amping cuts down on the stress to your amplifier by allowing it to "concentrate" on a limited frequency. The result is better signal reproduction with less chance of wave clipping at high levels.

Is that an accurate, yet very basic, depiction of bi amping? Please correct me if I'm wrong.

Also, I dont really have a full understanding of how to calculate the best wattage distribution for the mid-bass/tweeter speakers. Apparently my mid-bass/tweeters have identical sensitivity levels of 90db (1w/1m), but doesn't the crossover freq make a difference? They are rated at 125rms/side so does that mean 62.5w to each using the supplied crossovers? If the supplied crossovers are taken out, then what?

Here is a link to my speakers

http://www.polkaudio.com/car/product.php?name=mmc6500

I'm not asking for someone to tell me what to go buy, I want to learn this so that I can figure out what to go buy, for this application and others down the road.

I acquired my info from this page, but I had a hard time understanding it. http://sound.westhost.com/bi-amp.htm

Thanks........

You have a good beginning grasp, and Elliot's article (your second link) is a fantastic resource.  Look about 2/3 the way down that page and there is a chart of amplifier power relative to crossover frequency.  This will show you how to size your amps for the woof-mid-tweet.

The absolutly most important component in a bi-amp setup, IMO, is your crossover.  What crossover are yu planning to use?

Alright, I will look into those. An external crossover in line to the amp is going to completely replace the passive crossovers that were supplied with my speakers, correct? My job is just to match the frequencys to those of the original crossovers right?

For the sake of making things a little easier, is it safe to change the crossover freq. in order to balance the power to each component? I could use a 65w x 4 amp rather than a 100 x 2 and a 25 x 2, by setting the crosover at about 350hz. But is this safe for my speakers or do I need to stick with what the manufacturer frequency?

Thanks again......