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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
charles1dad's avatar
charles1dad
10,250 posts
 

Hi sakso136,

 Thanks for the update information regarding the Genus amplifier. The 845 is a wonderful tube in my opinion. I've heard the Elrog 845 in a friend's amplifier and it was heavenly. A few years ago I had the Elrog 300b in my amplifier and it was beautiful sounding but unreliable (I had the very early production tubes). I understand that the latest generation Elrogs have solved the reliability issues. Given the Aries Cerat approach your amplifier will have a fabulous over built power supply.

Charles


sakso136
17 posts
 
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
david_ten OP
5,480 posts
 
@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!!!
sakso136
17 posts
 
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
charles1dad's avatar
charles1dad
10,250 posts
 

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

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