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
It is hard if not impossible to find silver linings to these times, but if there was one it might be my local First Watt dealer's change of heart to let go of his precious pair of SIT-1 demos, prompted by  both a need to whip up some business and cull his equipment closet.  He was gracious enough to let me first audition them,  providing white-gloved delivery to my doorstep, then giving the boxes an alcohol wipe down before waving goodbye from a more than acceptable social distance.

Into my listening cave I carried these surprisingly heavy and legendary monos.  I gave them an hour to warm up and then sat down and by a gradual accumulation of degrees proceeded to be overwhelmed.  I had expected from Srajan's Nenuphar review that the SIT-1 would come out swinging with more speed and light than the SIT-3, but what I hadn't expected was how completely different the 1's presentation was.  It was a different sound altogether, larger, wider, deeper, more detailed, more intense tonal colors, livelier tempo and beyond everything, more engrossing.  In fact, as I listened through my Roon album file named Sound Check, I was emotionally pulled into music I had simply put there as a test of say instrument separation and had played hundreds of times.  This amp performs that rare magic trick of illuminating every nuance of recording space and technique, while at the same time bringing music to life in a way you can resist.  Don't even think about having these play some harmless tune in the background while you do your taxes: you'd have to turn it way down so as not to be sucked in completely. (I know you're thinking this smacks of  euphonics, that I must have had the bias set to pull in second harmonic distortion.  But not so, I preferred the needle straight up in neutral.)  

I think Srajan downplayed the SIT-1's superiority over every other amp he tried with the Nenuphars because he felt it unfair to tease with the unobtainable.  My hunch is the same synergy is attainable with the best of the no feedback, low damping factor, low powered SET's that several people here drive their lotuses with.  A/B ing the 1's against my LTA Ultralinear showed how close Berning's ZOTL design comes to Nirvana, but the SIT-1 poked through the clouds to a performance peak I have not experienced with the Nenuphars--or any other speaker for that matter.  Long live Nelson Pass.


   

Hi Steve,

I am also not surprised that the S.I.T.-1 is even better with the Nenuphar than the excellent S.I.T.-3. It is a closer match to the type of amplifier the Nenuphar was designed for. More in line with (as you identify) a high quality zero NFB high output impedance tube SET. Yet one can still achieve stellar results with other types of amplifiers. I did also feel/sense that Srajan tempered the differences between the two First Watt amps when I read the initial Nenuphar review. Steve if sounds as if you have stepped deep into the realm of music lover’s heaven with the addition of the S.I.T.-1 mono blocks. I suspect you are hearing (certainly very similar) what David is hearing with his system..

Charles


Hi Charles,

It feels more like I've fallen rather than stepped--not really knowing what I was getting into.  As you know, when you replace a critical piece of gear, like a loudspeaker, one thing leads to optimizing another and before you know it, you've replaced almost everything in your system!  I'm not there yet, but I have auditioned some cables (I was using vintage wire), so probably my next update, if I can keep myself from crowing more about the SIT-1's, will be that.  The Nenuphars make quick work of comparing cables.

Thanks for following along on this much needed, alternate world trek.  
Congrats Stephen.  That's great to hear.  And I know it's not a diy-heavy crowd, but if people find a SIT-2 and want to convert it into a SIT-1, I believe there are only two core differences... separate power supplies for the monos, and the adjustable aspect of the 2nd harmonic on the SIT-1s.  In the end, a SIT2 with one channel broken out into its own chassis and with its own power supply will probably get you most of the way there.  Anyone who's built a DIY first watt amp could easily make the conversion.  I've found a huge impact of adding a separate power supply for each channel.  I'll never go back to a stereo amp again.

Please keep us updated on the journey Stephen.

Steve,

It has been fun following your  listening impressions and reporting as your system has evolved. After all isn't this the entire point ?  Discovering  ways to improve our music listening experiences. and engagement. It really makes me  happy  when someone  gets ever closer in connecting with their music be it streaming or a collection of recordings.

Charles