Passive hipass question

[tocs100]

Been reading about Zobel and lcr networks, and have all my parameters collected, but I'm a bit confused on computing values of caps and such.

I've got a 2x6" box, 14 liters, 6" speaker-specs here:
Fs 118
Qes .60
Qms 5.63
Re 7.2
Now I know I don't double the Fs, but what about the other stuff? Since the crossover will see 14.4 ohms from the 2 6" in series, is that what I put in an online lcr calculator? My hipass point btw is about 650Hz.

I also want to run an 8ohm (Re 5.3, Le 0.52) 15"-cab in parallel before the 2x6," but I don't want to lopass the 15", as it'll run fullrange on one side of the stage.

So the system order is
8ohm sub, parallel out to
hipass cap, zobel cap & resistor, LCR network, 2x6" speakers in series for 14.4ohm load.

So when entering impedance in online calculators, is the crossover just concerned with (1)the speaker immediately after it?, (2)all speakers after it?, (3)or all speakers in the chain incl. the sub before it (which is 4ohms total)?

Depending on that for instance, my inductor could vary from 6m.h, 12m.h. or 20m.h.!!!

A BIG sketch of the circuit would be welcomed too.