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.


amplifier choice is very critical to achieving balanced tonality with the Cube full-range drivers, so choose an amplifier with higher output impedance (think ~ 0.8 ohms optimally) and thus a low damping factor (think 10 or so optimally). The Enleum 23R is said by many to work very well.

Absolutely right. Cube Audio very explicitly has made this point concerning low output impedance amplifiers ( High damping factor). Too much DF with their driver will be excessively damped, not good. I’d heed the guidance of the actual developers of this excellent speaker.


Great too see David Ten back on the thread!   Cheers

Agreed. 👍


What is too much damping?  The Cube Audio folks used solid state amps at a show I attended.  I assumed that they have a higher damping factor than most tube amps. If they do best with low damping factor, wouldn't they shine best with tube gear? 

@larryi Cube Audio primarily pairs their speakers with Tekron 2a3 SET tube amps for shows and demos. Sometimes the US Distributor uses First Watt SIT amplifiers at shows. Very unique solid state amplifiers designed by Nelson Pass that behave electrically and sonically like SET tube amps. The SIT-1 and SIT-2 have an output impedance of 4 ohms and a damping factor of 2 while the SIT-3 has a less ideal .25 ohm/30 DF rating. This review explains in all thoroughly: