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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
cal3713's avatar
cal3713
1,421 posts
 
And since everyone should love their preamp...
rwpollock's avatar
rwpollock
89 posts
 
Preamps are sometimes under-appreciated, with more time being focused on amps and speakers. It may have been Robert Harley who wrote that the amplifier determines the character of a system while the preamplifier determines the quality.

- Robert
philipwu
214 posts
 
@rwpollock  
+1 
rwpollock's avatar
rwpollock
89 posts
 
<<For those who are using SIT-3, what preamp are you using?>>

My Backert preamp uses two 12au7 tubes. Tube rolling is highly recommended. This evening I replace the stock JJs with Mullards. Amazing.

"My father's house has many rooms..."
rwpollock's avatar
rwpollock
89 posts
 
On a side note, FirstWatt has a new model out.
"The F8 revisits their most popular J2 model but simplifies the front end for just three signal-path devices per channel. It applies current not voltage feedback and improves on the J2 specs on bandwidth and damping factor."

The output impedance is 0.2 ohms, which puts it between the SIT3 and the J2, but far below the SIT1 and SIT2 at 4 ohms.
www.firstwatt.com/prod.html

- Robert
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