Clearly unafraid to go full Monty, Grzegorz had this amplitude plot for the Neodymium driver...

... and this for the ferrite version.


Here we see the raw ferrite-motor driver...
... and here the neodymium version's individual slugs.
The takeaway from the candid graphs is that, a/ in-room response nets a quite unheard-of 30Hz for the breed; b/ >10kHz treble is shelved down; c/ 7-9kHz exhibits an ox-axis rise (more with Neo) which flattens out as the speaker fires more and more straight out rather than being toed-in face on. Otherwise these plots are admirably linear and in fact, exhibit that slight tilt (up in the bass, down in the treble) which most listeners favour over perfectly horizontal. Detractors of the genre would have to concede that on paper, Nenuphar looks shockingly 'normal' and especially in the bass goes places where it just shouldn't.