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

Received my Nenuphar..
https://photos.app.goo.gl/sWgZmZ8UhqSVTbgw5

You guys are right on the amp pairing, the best pairing is with the SIT-2, Srajan is spot on in his assessment. SIT-2 with its low damping factor brought life to the music, there’s deep bass, meat on the bones with vocals while the highs isn’t affected. Schiit Aegir monoblocks with >100 DF is behind SIT-2 but the jump to >150 DF of the BHK250 is night and day compare to the Schiit, with the BHK music got noticeably thinner, colder... wow I never knew DF have such huge impact, glad I got my hand on the SIT-2. I would of been happy with the Aegirs, but definitely would not be happy with the BHK, it’s that big a difference.  The BHK was very good with my Cornwall III, another instance of synergy is everything in hifi audio.

@khragon Thanks for posting.  It's crazy how people just black & white every product evaluation when it always depends on the system.  Glad you got to try the speakers with an appropriate amplifier to see what they do...

khragon, congratulations and keep us informed of progress.

Thanks for the kind words and amp recommendations.  Will report back as the speaker breaks in

Hi khragon's,
Congratulations and I'm so happy with your very successful results.  It is just as the Cube Audio owner/designer would have predicted for you.  He designed the driver with a very light mass paper cone and an extraordinary powerful magnet motor assembly to absolutely provide excellent damping control. 

A high DF amplifier will simply over damp the driver leading to a dead/lifeless sound quality just as you described.  The Klipsch is a very different speaker and would very likely benefit from increased DF. Horses for courses.  The S.I.T.-2 is a splendid choice as you now can affirm. 
Charles