1. Electronic crossover. This means that you need several pairs of rear stages for how many crossovers you have, do you want 8 or 4 pairs of rear stages for your own system?
2. Quad crossover. The more crossovers, the more complex the circuitry required, the unit requirements are more demanding, requiring you to choose the performance of the unit is very well understood, otherwise it is extremely difficult to connect the various frequency bands.
3. Labyrinth structure. This is too esoteric and too much need to calculate things, you can find some labyrinth sound design to see, is really complex, and I know of labyrinth speakers are used in the full range of units (that is, there is only one unit) or want to use the same coaxial as the Tianlang, I don't know if you can be made into a labyrinth with 4 units.
I don't want to throw cold water on you, otherwise I wouldn't need to write so much, would I? I'm thinking from what I understand that you should first decide on a more suitable program to do, you can do it from the simplest 2 crossover 2 units, the simpler the easier to control, it is easier for you to control all aspects.
And one more thing, you need a reference CD player and reference cables (signal cables, speaker cables, patch cables, etc.), these are very important, if you want to make a set of more than the average civilian audio on the market.