Was planning to guess impedance then test to nail it down, I hadn't thought of the tweeter on the second diagram being 4th order but of course it is. So on A the phasing will be +90 deg on the tweeter, zero on the mid and -90 on the Woofer and B would be +180 (reverse polarity) on the tweeter, zero on the mid and -90 on the Woofer?
What else do I need to consider to sort out the phasing or is it going to be less of an issue with these pretty standard designs than I'm guessing it will be? I've done a bunch of other crossovers before but all the 3 and 4 ways have been 1st order, all the higher order xo's just two way. The components get big and very resistant (is that how you say that) up to a couple of Ohms, I want to keep the xo load under one Ohm and think I can do it by staying 2nd order.
To fill you in a bit more I'm looking at these speakers;
Tweeter;
http://jaycar.co.nz/productView.asp...d2=&pageNumber=&priceMin=&priceMax=&SUBCATID=
Mid in 6L enclosure;
http://jaycar.co.nz/productView.asp...d2=&pageNumber=&priceMin=&priceMax=&SUBCATID=
Woofer in 55L enclosure tuned to 24Hz, vents 80mm x ~400mm;
http://jaycar.co.nz/productView.asp...d2=&pageNumber=&priceMin=&priceMax=&SUBCATID=
With the Woofer I trying to simulate a natural/sealed roll-off of Qtc ~0.6 above the tuning point.
the xo points will be ~2600 to 3k high and ~300Hz low. First step will be building the tweeter xo only as I'm not sure how much the resistance of that tweeter flucuates from nominal and can reverse engineer the xo once I see where it crosses in real world testing.
I have speakers for listening loud and want these to play the 300Hz to 3k range primarily through the mids and use the tweeter and woofer almost as a low super tweet and high-ish sub. Want good efficiency and low noise amps for very clean sound.