This woofer most definitely has shorting rings, look at the description as well as the inner structure.
Check this:
Also don't know why you say that the bandwith is limited?
https://www.kartesian-acoustic.com/copie-de-wom185-vki
(no this link does not go to the WOM, but to the Sub, kinda confusing, I know)
View attachment 1248787
Edit: updated graph, they have the wrong one on their website, that is very very confusing.
I'm talking about Sub180_vMS. Not the _VKI drivers.
"We recommend to use this driver to cover the bandwidth 30 – 700Hz (-3dB)"
New sub265 available, pricey but impressive : https://www.kartesian-acoustic.com/_files/ugd/f62092_abd013b30f7a49618f77d05d64a80cba.pdf