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
I had the Nenuphars at home for a few weeks where I listened with my SET amps: Korneff 45, Fi X 2A3 and Line Magnetic LM805ia (805 power tubes); and non-SET amps: Linear Tube Audio ZOTL40, Schiit Ragnarok, and Nord One SE NC500DM MKII Dual Mono digital amp. I used my NAT Symmetrical line preamplifier when needed. With the Nenuphars, the 2A3 had the best overall sound at lower volume, but, as I cranked things up the Nenuphars liked the Line Magnetic and Linear Tube Audio amps. My source was a Mojo Audio Deja Vu music server and Rockna Wavedream DAC. Cabling was all Clearday. The Magus speakers I heard at Jon Ver Halen's house with First Watt SIT3 and F7 amps. His source was a Pass Labs preamp with a Metrum Pavane DAC, not sure what music server he had. He was using Duelund speakers cables which had me intrigued and impressed.

So, in fact, I was comparing the speakers in the context of completely different rigs, but their superb resolution, tonality and imaging came through in both instances.
Deepfield,
Thanks for your reply.  You have a very nice collection of amplifiers.
Charles 
Thanks deepfield for the information.

We are getting great results driving the Cubes with Mola Mola Makua/Kaluga’s and look forward to trying Bakoon amplification soon with the Cubes.

We have the Nenuphars at present and will be receiving Magus shortly. I’ll come back here with thoughts/findings when we have made comparisons
@deepfield  Thanks for sharing your impressions of the Nenuphar and Magus speakers. Much appreciated.
I estimate my Nenuphar speakers have 1500 hours on them. I kept precise numbers through early May and had logged 1100 hours as of May 7th. The EML 2A3 tubes have approximately 900 hours on them. 

In addition to break-in, I have worked on improving isolation and grounding. 

Next areas of focus are my Streamer / Player. I may move to a new brand or upgrade my current units. An in-home demo of a Server (being setup) should help decide direction. I will implement a full fiber optic network solution [I am 100% streaming] should I stay with my current server and player.

In the pipeline is a new Linear Power Supply (should be in system by the end of next week) for dedicated (and higher quality) supply duty for my Server. A full system power conditioning / power supply loan is in the works.

In case it isn't obvious, this is my way of saying that I am beyond pleased with the performance of the Cube Audio Nenuphar speakers as well as the components in support of them: Denafrips Terminator DAC > Grandinote Genesi preamp > Found-Music 2A3 monoblock amps. And committed to this system.

I estimate close to 750 hours of active and engaged listening time. The Audio Room serves as my home office (minimal, movable and height adjustable desk/seating in the 'sweet spot' and fanless (read silent) work electronics in an environment that measures in the high 40s for ambient noise, with the AC intake two rooms away serving as the primary culprit... when disabled: mid to low 40s).

Given my time and familiarity with the speakers, I'm ready to start writing a review.