run in.....and im happy as a pig in $|-|1T©
After running them in for about 100hours with low level sine sweep 20-100Hz T= 30s, the slight inital sizzle and clappiness has all but gone, and comparing them with tweeters I know are good from 3-15k within+/-2dB, they sound comparable in tone, although with that metal cone 'detail(or whatever it is?)' that soft domes
dont have. 2nd thoughts; its maybe the polar response of these things. i guess theyre omni over really quite a massive range, and that initially worried me. after thinking though i dont think of it as TOO much a problem if i get them crossed low enough to match the directivity of the woofer. so bigger woofer, and i have to go lower in the HP xover. so realistically i COULD just use as normal tweeter with the 4" audax, and achieve a small sealed monitor with a respectable polar over entire FR.
pairing them with my old audax AP130ZO in 15l BR, ive mounted on in triwall card baffle about 2x3', and offset about 1/3 up and 1/3 across, probably NOT the best position but i have to say it was a little like a lion kill in a wildlife documentary, a bit of a hack and mount affair.
then i proceeded to cut a 6" hole so the audax woofer would fire thru the baffle, box on its side, and the 'flap' left from cutting the hole was left attached at the top to baffle off the TB's backwave a little, since there was a hole thru the baffle next to the driver now.
i found that adding 2.2mH to the existing xover rolled off the audax well, probably about 1kHz...its been a blur of experiments
i figure i got total 2.5-3mH maybe, with a 5uF cap in parallel, ill have to work it out when i have more time!
then i used the w2-800sl with 0.22mH LP to help roll off the HF rise a bit. this worked fine till i got a little louder, when the 2"er complained a little...THD LOTS. but its robust enough for near field, the THD would force you to turn it down if you got it loud enough at desk distance.
however adding about 30uF helped matters cutting excursion
enough, and with 10R on the driver side, i think im changing Qes AND padding to match to the audax;
is that actually possible?

if it is itd be one of the things where there can be no bad side!
If i get round to sitting down and doing some sums, then i might actually try to work out the xover that way lol.
all in all, im pretty chuffed with these little things as i had an awful feeling
just post purchase, that theyd be cheap and nasty.
Thanks for some idea guys, im thinking front to rear TQWT (driver at front, vent at rear; line running in the depth dimension. Using Audax AP100ZO in a sealed box, about 4½ litres, with the tangband in a compartment of the box. that way, ill have one non parallel wall, where the partition is. box media is likely to be granite floor tiles, glued with epoxy(presuming i can), heavily lined with felt/carpet/underlay and filled with BAF and cubed acoustic foam.
anyone with any further sage advice is most welcome to contribute
cheers!