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.

I recently got a good deal on a used amplifier by Gold Note, the PA-10 ($2K new). It is their introductory power amp and, like the PA-1175, has a switch to change the damping factor to either 250 or 25. Of course I immediately set it to 25 and hooked it up to my Nenuphars.


I'm in the tube camp these days, but I'm going to keep the Gold Note as a backup in case my David Berning amp has to go to the shop. I'd rank the PA-10 below the SIT amps but slightly better with the Nens than the Bakoon. It has the usual virtues of solid state -- the bottom end, the detail. Vocals have good presence but lack the palpability of tubes and the floating decays, such as near the end of Scarborough Fair where Garfunkel's "parsley, sage, rosemary and thyme" floats off into the empyrean.

I’ve seen this amp and was also intrigued by the switchable damping factor. How did it sound with the DF set at 250?

Anyone try any of the Luxman Class A integrateds with Nenuphars? I am curious to try the L590axII integrated and just simplify to that and a dac/streamer.

How did it sound with the higher damping factor. Better than expected -- a little drier perhaps and a shallower soundstage.

By the way, word is that Nelson has found a new source of industrial SITs. Apparently they are larger and produce more heat. There is a SIT-4 in the works, but it may be a monoblock configuration to dissipate the heat.

@toetapaudio are you UK based and running the 23R?  Please drop me a PM if you are.

@realworldaudio - great videos, I came across your channel a while back and have learnt a lot - so thanks!  Have you ever heard the Cube in TQWT or MLTL vs your Voigt pipe?  Difficult to know which enclosure best suits the Cube drivers...

Why F8 Magnus over F10 select?  Seems as though the F8 Magnus has somewhat smoother frequency response...