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 have been meaning to add a Vcap ODAM in the Nenuphars. I have some on my linear power supply filter caps but I have not done played with it with the speakers. Anyone has any experience on how they perform on speakers

The Nenuphar is single driver and crossoverless. Where would one utilize a capacitor in this speaker?

Charles 

@jonwatches1 I auditioned the Voxativ Hagen speakers with a Voxativ sub driven by a Voxativ tube amp on three occasions--separate listening sessions at the same dealer, same set up. This was maybe 4 years ago, long before I had ever heard the Nenuphars, so it is obviously not a comparison. What bothered me at the time was an initially very attractive sound that I found fatiguing after about 20 minutes or so. I brought my own material in to play, same result. I found the highs to be forward and irritating on a lot of material. Could have been the digital front end (I don’t remember what that was), room, cables, etc.

The Nenuphar is single driver and crossoverless. Where would one utilize a capacitor in this speaker?

I was thinking maybe as a bypass cap to see if anything yields interesting. may not be a good idea after all :-)

A bypass cap is just a smaller value cap that goes in parallel with a larger value to extend and purify the signal as large capacitors are inductive (therefore not as pure or as extended as a smaller cap).  There is no cap in the Nenuphar.  If you bypassed the driver (across the hot and negative) you would be adding a filter.  A no no. What you want is to enhance the driver.....not diminish it.  Ground Enhancer, Bybee thang....hard wiring to the voice coil wire, better wire, eliminating the rear binding posts......these enhance the speaker.

I was thinking maybe as a bypass cap to see if anything yields interesting. may not be a good idea after all :-)

I gotcha , problem is there’s nothing to bypass (With a capacitor). Ultra minimalist speaker design and a main factor as to why its sound quality is so highly praised.

Charles