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
Joined the cube audio club recently with a nenuphar. Mind blown!
One thing of significant importance:
The nenuphar needs the RIGHT amp to show its true colours and abilities.
I was replacing both amp and speaker (had a diablo 300 with kef ref 5s).
The gryphon was still not sold when nenuphars arrived. I listened with it for a week or so, being very careful with volume. The sound was OK. I thought, its break in, speaker will open up slowly. Then tried an old krell integrated. Seems cause it had a lower damping factor, sound started flowing with more ease.
Then, my LM845 premium SET amp arrived!
Words can't even describe the amount of change is speaker character. Opened up, singing with ultimate ease. Dymamics exploded, literally. Better everything. Bass changed a lot, it is so deep, fast and extended. Vs the diablo, the sound was out of control and felt congested somehow.
Word of advice, if you are going for a cube, you must choose your amp carefully to get the maximum of it. Its a speaker to die for with the right amplification!
Is it just me or is 15,000 clams for a single driver speaker pair seem somewhat pricey? I know...it's me...damn...
@saleh84  I second  @toetapaudio 's congratulations on acquiring your Cube Audio Nenuphars!!!

Thanks for sharing how incredibly well the speakers are working for you, paired to your Line Magnetic 845 SET amp.
Hi sale84,
Your situation is totally expected and predictable.
The designer/builder has clearly stated the Cube Audio Nenuphar is specifically meant to be used with amplifiers possessing
1 little or no NFB
2 Relatively high output impedance
3 low damping factor (DF)

The special single driver has a very powerful magnet/motor assembly and is very well damped and controlled. An amplifier that utilizes high levels of NFB which results in very low output impedance and high damping factor is exactly what you need to avoid.

It is no surprise the superb Nenuphar speaker sounds magnificent with a high quality SET amplifier (Most often zero NFB) such as your Line Magnetic 845 or David_ten’s teriffic 2A3 SET mono blocks. High NFB amplifiers (which yields very low output impedance) are detrimental. IMO the Nenuphar is worth every penny based on feedback I’ve received. BTW solid state amplification are  fine as long as they adhere to the designer’s recommendation/ guidelines.
Charles