If they have different parts in line with the two pairs of woofers, it would make sense and help make them useful to higher frequencies. At that point it really becomes a 2.5 or 3.5 way system depending on what horns are on top. The only concern for home use is that such large speakers may not really function with the intended directivity at the listening distances and smaller room dimensions of a home theater. Ultimately be sure to take some measurements to insure things are behaving as intended at the listening position.
If you found a surround processor which could output the 8 channels digitally that didn't have room correction, you also have options like the
MiniDSP DDRC-88D, which is 8ch in/out by AES giving you Dirac correction on the 8 channels to feed into the DCP-300 digitally. If you were able to get the filter settings for the parts, you could even look at combining DSP crossovers and Dirac Live correction in the
MiniDSP DDRC-88BM which gives you full flexibility to run active speakers from a Dirac corrected input channel. You would probably need 2 units for the system, but having Dirac integrated is intriguing. In a quiet basement the big hurdle with these very efficient speakers will be keeping an eye on the noise floor from the electronics to keep background hiss low as practical.
Looks to be quite the kit you're assembling!
