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
A very key aspect regarding the Nenuphar is it was designed ’specifically ’ to be driven by SET amplifiers with high output impedance/ very low damping factor (DF). I could imagine a perceived "dryness" to the sound of this speaker if the amplifier DF is more than required for this unique speaker. It would effectively damp the life and "soul" of an already very damped/controlled driver with its exceptionally powerful magnet /motor unit. I suspect one wouldn’t want or need a DF > 10 or so.
Charles
Hi Charles,
I don’t think that it’s the architecture of the amplifier that is the cause; I think I’m simply hearing the paper in the driver.
I drove them with three different amps: my 2 watt Thomas Mayer 45 SET, a 150 watt Solution SS amp and, finally, with a 30 watt Unison EL34 PSET integrated amp. In all cases I perceived dryness. I need to stress that what I hear as dryness, others may welcome as neutrality and honesty. Everyone should listen to these amazing speakers and decide for themselves.
In Herb Reichart’s recent blurb he says "... (the Nenuphars) have a direct, fresh, nothing-between-you-and-the-recording presentation." I would agree with him but to me it felt more like "nothing between me and the stylus."
Hi exlibris, 
I get your point and understand the subjectivity we all experience with listening. No doubt that both the Nenuphar and Odeon horns are excellent sounding speakers but presenting their own individual sound/sonic character. 
Charles  
What an interesting design!They do look like flowers.Single driver designs intrigue me,but there's none to be found around here to audition.I enjoy hearing about other's experiences though.These are particularly fascinating.
@david_ten 


heard the speakers at Axpona. and they sounded nice, but  was not wowed by them,maybe the room/gear?

any updates on your pair and  do the Cube speakers  blow away the Tektons?    was looking for a SET style speaker and the Cube was on the list and also the Tekton SET speaker


@roadwarrior75  @steakster   and others.... I've been reluctant to post on your comparative questions due to my discomfort in possibly offending my fellow Tekton brethren. I have also developed a number of wonderful friendships initiated because of the Tekton Design speakers.  However, I need to cover this, so it may as well be now.

I encourage @charles1dad  to offer his take, as he's been with me throughout the move to the new amplification and speakers. He is more diplomatic than I and is better at communicating these matters, especially since he is approaching this from a non-emotional perspective.

First, I've heard the same regarding the presentation / performance at Axpona. 

In summary,  @douglas_schroeder was prescient in this post on the thread exploring my options prior to the Nenuphar purchase:

"When you build the alternative system and get it tuned up you will question everything you think you know about your reference."

There is no better way to elaborate on what I need to share... Douglas Schroeder's post conveys it all.

My reference has moved and changed, and in significant ways.

I have nearly 850 hours on the Nenuphars and am closing in on 250 hours on the Emission Lab 2A3 Solid-Plate tubes. The rest of the system, including cabling, has many, many more hours on it.

For all purposes the system is fully settled, though there are areas I will be addressing in the near future. For example, further positioning efforts, a new IC termination that will eliminate the adaptor, isolation, etc.

Three nights ago I brought the Tekton SEs into my system. This was a short A/B and I will be conducting a more thorough one. My family has been visiting this week and my brother was interested in comparing the two speakers (the rest of the chain was identical). 

He asked that we move the SEs out after a half hour. I pulled them out at the 2 hour mark. The SEs, in comparison [EMPHASIS: In Comparison only], sounded veiled, flat, slower, less engaging and involving than the Nenuphars.  He commented on how incredibly real and natural the music sounded via the Nenuphars and he was astounded at the level of clarity and musical information conveyed. He was especially surprised by the bass performance and insisted that I was 'lying' to him when I told him there were no separate bass woofers or subs in the system.

Nothing about the SEs has changed. They are likely performing at their very best at this point in time based on my current system. What has changed is my reference and preferences.

I have not heard the Tekton PS12 or PS15, so I cannot comment on them.