Tried a little and gave up quickly. The SZ2000 uses an acoustical crossover, where whole regions of the frequency area influence each other, as both drivers work simultaneously over a big area, but phase inverted with mixed results (deletion, addition, balanced...). For example: the SZ2000 weakest point is the too loud lower mid area. So according to the book you add a small capacitor in front of the small driver to limit the lower bass/mid that it reproduces. What happens then is that you change the energy mix between sub and mid/tweeter driver. Lowering one in energy will simply have the same now be heared more strong from the other one. In the end the added capacitor, even when made very small (below 1 µF) had zero (!) effect - unless one disconnects the sub, then the change became audible immediately.
The existing crossover in the european E version and its minimal effect on sound (and one that doesn't make much sense when you see the component values) is another example of why this seems a very complicated and tedious task.
Edited by Phoniac - 11/30/16 at 8:56pm