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.

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:


Cube Audio has explained in detail about their rationale for good amplifier-driver matching. No doubt that the speaker owners can choose what ever amplifier they want to.  Cube Audio is only offering informed guidance.