The KBX is a superb crossover. I am using one with my biamped Divas. Unfortunately, modifying the crossover frequency and slope is difficult since Krell has no documentation. I have information for the B&W 801 speaker so if you are able to find a KBX and the crossover of the 801 is the same as your 800 you are welcome to the info.
Krell KBX crossover.
I was doing some reading on the Krell KBX crossover and was really interested in finding one for my speakers which are B&W Matrix 800s. I am running a Krell FPB 600 with Krell B&W baf ( bass alignment filters, balanced). ARC Ref 6. Are the Krell KBX only used when bi or tri amping? Also what sonic advantages would the KBX bring to my speakers. Thanks in advance.