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
Indeed.
The 2 friends i was referring to,are a close friends,and i m familiar with their systems,tastes( specially the lm 845 one).
All our audiophile group where thrilled when hearing the combo nenuphar+genus.
Honestly,no idea how much is the damping factor and negative feedback on the genus,but,when in action,you feel that those 22 watt act like 300 w.
The transients,the dynamics,the bass,seperation, i can go on,... all there with ease.
Those 22 w are specials,and many people said,it has no problem driving even mid efficiency speakers.
Another friend,owning sb amati,ordered genus at the same time as me,afterhearing it,let see how it goes....
The lm845 friend went and bought elrog845 and elrog300b,replacing his psvane acme 845 and 300b,and he concluded that elrog is the winner.
Sami
@sakso136   Sami, thanks for the wonderfully helpful and informative posts. I learned through your findings from the amps (and tubes) driving your Nenuphars. 

I'd love to get an 845 amp in for listen as well.

Let us know your in-depth findings once your AC 845 Genus is in system. What a pairing!!!
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!