Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

Did anyone try LTA Z10 with the Cubes ? I hope it has enough to power the Nenuphars. The spec doesn't list much details but folks at LTA said they use low -ive feedback and low DF. 
Anyone have compared the Z10 to a SIT-3 ?

Why is a low damping factor (high output impedance) desirable for these speakers?  Is the frequency response  change from the high output impedance and the impedance curve of the speaker a favorable interaction?

As a fan of low output tube amps, many of which have typically high output impedance (low damping factor), I generally don't find low damping factor to be a big deal, but, I never thought of it as a positive attribute.  

@doni  Don, if you haven't done so, I suggest reaching out to Jon Ver Halen, the US importer for Cube Audio. He may be able to connect you with a client in your area should the client be willing, given the current situation.

Refined Audio contact link:

https://refinedaudio.com/pages/contact

Thanks David, will do.

Larry,
The damping factor and amplifier output impedance considerations were discussed in ample detail in the original Nenuphar review in 6 Moons several years ago. The driver designer and builder explains why this approach was chosen. Probably explained on their website as well. 
Charles