CLICKY
I dug around until i found something that answered my question.......
Using two amplifiers and two sets of speaker cables to drive the existing passive crossover is something I call "passive biamping" or "active biwiring". Various websites may claim that it's true biamping, but it's not, never was and never will be.
In some cases users may hear an improvement, but make sure that it really is an improvement and not just a difference. Because you have separate amps driving the two sections of the crossover, you can easily have a level mismatch that leads you to think that the sound is "better". The gains of the two amps used must be identical, or the original balance between mid and high will be changed. Naturally the specific frequency depends on where the passive crossover splits the signal. Apart from (usually) a slightly easier load on the amps, both amplifiers still reproduce the full audio bandwidth, so there is no effective power gain.
In general, it is likely that the improvement - assuming there is an actual improvement of course - will be small. It will commonly be so small that the additional cost cannot be justified, but this is cold comfort if you've already bought the amplifiers and speaker cables. Speaking of which, make sure that you read the articles on this site about "high end" (rip-off IMO) speaker cables before parting with large sums of money.
..........i took from this that both channels still put out full range and the cross over eats what isn't allowed through. From what i gather 100watts into a crossover comes out 100watts per driver minus the power lost in the inefficiency of the crossover. So running bi amped on the crossover isn't as efficient as it sounds because lots of power is lost filtering lows from highs and visa versa. Loving my 360.2 more and more every day...