I'm doing something similar, but with an array of drivers for each frequency range. I ended up using six stereo amps in mono-block form with all 12 channels being driven. By sharing the load of multiple drivers between two channels of the amp, i was able to keep the impedance up, but it is still quite low compared to most designs.
The thing that you have to take into consideration here is the gain characteristics of each amp. Unless you can achieve similar gain characteristics, the presentation will become VERY lopsided as dynamic intensity changes at various frequencies. You are entering into a whole new world of experiences and learning potential with such a system, so be prepared. I have to assume that you're going to actively cross the system over in order to achieve the full benefits of such an approach??? Sean
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