I am getting ready to BFD my custom Acoustic Visions Denali. Well, it's basically a Denali. 24" Acoustic Visions cube with two 18"/2200 gm PRs, Tumult driver. It differs from the "stock" Denali in that I had Kyle leave off the Keiga plate amp and am using a Mackie 1400i pro amp instead. I am not quite ready to BFD it as I still need to get a balance box to correct for the -4 dBu to +10dBv difference between the pro and home units... Since I'm going to be running the sub with Klipschorns, I think it might be a good idea to use a 50 Hz low-pass FMOD to feed the LFE to the BFD. My reasoning is that the 50 Hz low-pass will allow the sub to deal only with that last octave and 1/3 (16-50 Hz) where the k-horns are rolled off. It was suggested that a 50 Hz FMOD would "create a gap" between 50 Hz and the 90 Hz Yamaha LFE X-over point. However, I think that may be exactly what's needed, as I do not necessarily WANT the sub outputting anything which will interfere with the K-horns bass output, and possibly complicate EQing (BTW, I'm running all speakers set to LARGE, including rear surrounds...KLF-30s). One alternative, of course, is to run the LFE unfiltered to the BFD, and use the BFD to tailor the room response and tame the K-horn/sub bass interactions. Which seems less straight forward and more complicated, to me anyway... So my idea would be to use the sub with the 50 Hz low-pass for the lowest octave only and let the K-horns take care of themselves. Does this sound like a workable way to set-up the sub? Would anyone have any suggestions as to how to do this better?