As I said previously, if I were to try and build a speaker system with a driver that handled the entire frequency range (obviating the need for a crossover), I would try and put as many of them together in parallel as I could in the same box, but taking into account the impedance issues involved when wiring speakers in parallel.
Ok, but this thread is about the LGK 2.0...
If you want to talk about how you might design something different, please consider starting your own thread. Btw, if you want to start adding drivers to a vented enclosure, know that you will need a bigger box. In the simple case, adding one more driver, typically means doubling the cabinet volume.