Bi Amping my B&W Matrix 800s


I have been thinking about bi amping my B&W 800 Matrix . I am now using a Krell FPB 600 with a Mark Levinson 38s preamp and a Krell B&W 800 Series bass Alignment Filter. With the B&W Matrix 800 speakers being quad wired. I have been considering buying a Krell FPB 300 to bi amp with my Krell FPB 600 using the Krell FPB 600 for the 4 woofers (2 on ea. speaker) on my 2 B&W 800 Matrix and the Krell FPB for the tweeters and midrange on ea. B&W 800 Matrix . Can this be done with my Mark Levinson 38s preamp? Would bi amping really do justice for my B&W Matrix 800s? And how difficult would it be ? Thank you all .Mike 
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Im really also concerned if i can use my Mark Levinson 30s preamp to bi amp . I have a R and L balanced main out XLR that is hooked up to my Krell B&W 800 bass alignment filters 2 , balanced. And my R and L balanced input 1 is going to my cd player. Which leaves only the R and L balanced input 2 . But i still have R and L main out RCA still open. Any suggestions as if i bi amp with my ML.? 
There are 6 active crossovers on a pair of B&W 800s. What did that cost you to replace or recap. And how hard is it to find a reputable B&W service tech who would do this. 
edwyn when i put my 800s together and the caps in the passive crossovers looked great. And they sound fantastic. So how can you tell me they need replacing? 
Also they are no joke to take apart and put back together especially when u live alone. 
cleeds and edwyun  No sorry there are 4 passive crossovers in each 800 and they have polypropylene capacitors. They do not absorb moisture and they do not store heat. They will last longer than you. Those speakers were over driven by users . Im sure they were abused or you inherited bad speakers.