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:

Link to 6Moons review by Srajan Ebaen (August 2018):


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.

@gavin1977 that frequency response curve for the Nenuphars is for the V1 version. Changes in cone configuration in the V2 version largely addressed what you describe (has a fuller midbass and less upper midrange rise). Yet, IME the V2 is still sensitive to toe-in much as the multiple lines on the V1 graph indicate.

Haven’t heard the Jazzon in person, but, as you say, its graph looks to support your experience, at least at whatever toe-in was used for that single line. It would be informative to see the graph at different toe-ins for the Jazzon. My bet, based on working with the Nenuphars, is that room placement/room treatment/toe-in optimization should go a long way toward improving the peaks and valleys shown with the Jazzon.

I just checked - it was the v2 that was demoed to me.  I think what I need to do is get it in my room and work with it.  A bit of a risk, but I feel as though I can get it to the point that I’m happy with the frequency response.

is Refined audio still the distributor/dealer in US for the Cube product line ? I sent Jon two emails but no reply so far.

I have had the Cube Jazzon speakers since late June of this year. David Ten has raved about Cube speakers on this thread and others and that is what I heard at Axpona when they were played with Pass Labs gear.  Sensation speakers is what I heard.  

I wanted to love them in my room and kinda did with my strong confirmation bias until I concluded that the were bereft of LF response and the expected spatiality and had nowhere nearly the ambient response I heard of them at Axpona.  

To be honest, I put them up for sale as they came nowhere near to performing in my room to my liking with a stellar pair of 300b monos so bought a pair of Dynaudio C1 Signature speakers which I had before, loved their sound, but parted with them because I didn't fancy their blonde finish. Right, I know, a foolish sale, but the new Dyn's have the awesome mocca finish, pure eye candy and a sound to match.  The Dyns will arrive next week. 

At any rate, last Saturday I sat down for a long listening session and by God, the Jazzon speakers just blew me away.... sounding just like I heard at Axpona.  Overnight, the speakers just blossomed with maybe 100 hours on them.  I recall I had the same experience with my Spatial Audio M4 Triode Masters.... they sounded not that great until I had well over 100 hours on them and I might say that their sound improved mightily for the next few hundred hours.

My intent in my comments is to note that the Cubes speaker, in my estimation, take a wicked long time to run it to perform as they ultimately can do so don't be too impatient during the process... they will come alive at some point.   They now are sensation speakers, with ample bass absent a subwoofer and have a poise and delicacy to the sound that is remarkable with a massive soundstage. You gotta part with some coin to acquire them and while I have not heard the upper-end line of Cube speakers, I am content that these provide a fair approximation of their more expensive line of speakers .  The Cubes do require careful matching with you amplification as they match best with amps with a low damping factor, which inherently includes most all tube amps as well as the sensational Enleum SS amp as well as the Pass Labs First Watt ss amps. 

Be patient with the run-in process with Cube speakers - and all new speakers, they can take a very long time to sound their best.