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.

Fully agree with the feedback regarding optimised chain of electronics - something I have experience with. The amplifiers being used here are the ones with a proven synergy.


What I’m hearing is the above frequency response. Dip in lower mid-bass, then a rising frequency response - this tilted up frequency response means I end up trying to compensate with the volume control for the lack of mid-bass, which just makes vocals even more shouty.

Perhaps the Nenuphars don’t have this issue as much:

But I can’t say that I heard them as sounding completely flat either.

I wonder if I should have taken the time to hear the F8, which is a very flat frequency response.

Just trying to troubleshoot, as there’s real promise here and so don’t want to admit defeat just for the sake of a lack of optimisation.




@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.