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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
rwpollock's avatar
rwpollock
89 posts
 
Speaking of different solid state amplifiers, I was doing some reading on damping factors and came across a link to two Gold Note amplifiers out of Italy, the IS-1000 (integrated) and the PA-1175 (power amp). Both models have a DF option which can be changed on the fly. The high setting has a DF of 250 while the low setting is at 25.

Has anybody listened to one of the Gold Note amps?
 - Robert
cal3713's avatar
cal3713
1,421 posts
 
@rwpollock Not an answer to your question, and it's been stated earlier in the thread, but just keep in mind that adjustable damping factor and adjustable levels of negative feedback are (always?) synonyms. Might be useful for expanding your amp search if you've been looking for amps with adjustable df... 
cal3713's avatar
cal3713
1,421 posts
 
I just ran into the damping factor thread and see the above comment was completely unnecessary. Sorry Robert.
charles1dad's avatar
charles1dad
10,250 posts
 

Hi cal,

However you made a valid point. Negative feedback (NFB) level manipulation does affect these amplifier parameters.

1 Gain output decreases as NFB is increased..

2 Output impedance decreases as NFB increases.

3 Damping Factor increases as NFB increases.

Output impedance and Damping Factor have an inverse relationship.

Charles'

david_ten OP
5,480 posts
 
FYI - There are two Nenuphar active listings here on the 'Gon. Both in the Black finish. One New, the other a showroom demo.
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