crossover help with my B&W 603 please

[johnmark]

I am ready to mess with my B&W 603's to bi-amp them.
I want to replace part of the passive crossover with active.
They are designed as a 2.5 way.
B&W was kind enough to send me the crossover schematic
and I have a basic understanding of crossover theory.
It looks like a 3rd order crossover on the tweeter and a cascaded? 1st order on the midwoofer and .5 woofer.

The crossover board is set up for bi-wire, but this just splits the tweeter circuit from the 2- woofer circuit. I was more inclined to feed the midwoofer and tweater with one amp channel and the .5 woofer with another amp channel.
Is this the better way to approach the biamp?
I have the 4 channel amp.
Should I just disconnect the current speaker leads to the .5 speaker and use an active lowpass to feed it instead?
Or should I pull the inductor out for the .5 woofer and just use it to filter the .5 woofer.

Would either mod affect the filter function to the midwoofer?

I appreciate any help!!!

[rabbitz]

I'd suggest doing the way B&W intended..... 1 amp for the tweeter and the other for the woofers as it will be more beneficial. Try bi-amping with the passive xo in as I think it should give a nice improvement. If you don't like that, then go active.

Not sure if you would have to leave inductors in for the 0.5 woofer when running active to the woofers.

[costiss]

ok... dont attempt active cross unless you are in deep water.. active xo will need passive impedance correction and measurements to get it right... try passive xo biamping (1amp-tweeter+1amp woof-mid).. further tweaks would be (if you have measuring equipment)_, to tweak the crossover a bit.. otherwise you could just put in some better components..
beware however, that pass xo biamping can be problematic, since the impedances in the cut area of each xo branch are usually quite strange, therefore you need a lo/hi pass filt respectively in each amp..