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


Cube Audio (Poland) designs single drivers and single driver speakers. 

Principals are Grzegorz Rulka and Marek Kostrzyński.

Link to the Cube Audio Nenuphar (with F10 Neo driver) speaker page: 

https://www.cubeaudio.eu/cube-audio-nenuphar

Link to 6Moons review by Srajan Ebaen (August 2018):

https://6moons.com/audioreview_articles/cubeaudio2/

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Parameters (from Cube Audio):

Power: 40 W

Efficiency: 92 dB

Frequency response: 30Hz - 18kHz ( 6db)*

Dimensions: 30 x 50 x 105 cm

Weight: 40 Kg


* Frequency response may vary and depends on room size and accompanying electronic equipment.
david_ten
Hi david_ten,
i will for sure update here my findings.
i m playing with an upgraded elekit 300b integrated now.( gold lion tubes).
sounds much better than my own c51 mbl.
9,5 watt give more and better bass than 300 w!Regards

sakso,

Your comparison of  the 9 watt 300b amp and the MBL 300 watt amp is consistent with findings from other posters earlier in this thread. It drives home the unique design/intention of the very special driver used. An ultra controlled driver cone doesn’t need additional damping (DF) control from the driving amplifier.

As you and others have demonstrated excess amplifier DF will deteriorate the sound quality of the Nenuphar. Your powerful MBL amp very likely has a relatively high DF (and low output impedance). These traits are no doubt desirable for some (perhaps many) speakers. The Nenuphar is an entirely different approach. Given the superb results of the AC Genus/Nenuphar pairing one could assume the Genus amp has very little (or maybe zero) NFB and thus a low DF and moderately high output impedance. Ideal for the Nenuphar..

Charles

Interesting recent posts by all addressing synergy of Nenuphars with various amps.  Good to hear reinforcement of the AC Genus magic--it received a rave from AVShowrooms.  The LM 845 Premium is also a pairing I would love to hear--although I believe it uses some negative feedback in its circuit, but don't quote me.  I recently got to try a Tektron 2A3 which impressed me with it's purity.  But I preferred both the SIT-3 and the LTA Ultralinear--more grip and meat on the bone.  

In fact, not to drive everyone crazy (anymore than it's driving me crazy) but I've taken another turn with my amp preference.  David_ten was right on (no surprise) about speaker break in.  Somewhere between 125 hours and 200 hours the SIT-3 began sounding a little thick and slow--I kept thinking it was cables and began swapping things out.  Then I put the LTA back in and voila, the veil disappeared and we had dynamics galore plus stronger base (the LTA remember has a much lower damping factor).  Obviously the speakers are continuing to open up and reveal everything in their path.  Don't get me wrong, the SIT-3 makes great music with these speakers but as you get to know them better--i.e. as they break in--you (or at least I) tend to want more of what they do best which can be so life-like and unrestrained.  But of course nothing's absolute.  There are those flavors ranging from the 2A3 type low wattage SET's to the relatively burly 845 and SIT-3 type amps with perhaps the classic 300b SET somewhere in the middle.  Wish I could try them all!
Hi Steve,
 Your comments and listening observations are always insightful and interesting. Some people mock the idea of audio component burn-in and say it's merely psychological or just getting use to components/speakers sound character. I believe that burn-in is real. I don't claim that differences are night and day in degree but certainly quite noticeable. 
Charles 

 
 
Really interesting stuff. My omega 4.5” single drivers - cones w/surrounds weigh in at 1.5 grams. Not sure how that compares to the Nenuphars, but I imagine they are also extremely light. Whenever I audition an amp with a higher dampening, it seems to restrain the lightweight driver.
I just purchased a dht 45 set, which I am super excited to hear with my speakers.
would love to hear the Nenuphars one day. When I listen to quality speakers with crossovers, I can’t get back to those full range efficient speaks quick enough 😉