I am actually doing research to support my new project, but I am distracted.
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I have a new design almost ready. Worked on it for almost two years. Could not make the math work at first, but going into thirds, which I HATE, instead of fourths, it all seems to have come out quite well.
I am using two eighteen inch high power JBLs powering straight into a center chamber, tuned highish drivers do not face each other, but rather are offset, and each one faces into a "kind of offset cone," to distribute the pressures evenly throughout the chamber. Each facing pair is in its own tuned chamber, one tuned higher, yet below the center chamber, then one tuned much lower, well below the other two (two thirds over the size of the other - center chamber = one third, first power chamber 'two thirds, second power chamber = six thirds) with triple the back space as well.
This looks good on paper.
SO neither driver supports the entire enclosure at any one frequency, but they both contribute to every projected waveform as well as does the center resonant chamber, powered by both, yet subject to niether, since each driver powers its own vented chamber. This might just work. There is no program available which can simulate this unique configuration, but I am satisfied that the total summation of all resonant chambers working t once will be more strong than the graphs of each one taken separately can show.
I believe that the center chamber, tuned to about eighty Hertz will act as a stabilizing element to the other two chambers, which are both tuned one third octave then two thirds octave below the combined chamber. I have a great deal of hope for this new project.
Now I just need to build one.