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.

Showing 9 responses by keithr

are people ordering from the distributor with return policy. don’t see a SoCal dealer so figuring out how to hear a pair.
Anyone compare the Cubes to Zu? Seems Druid VI. Nenuphar would be super interesting.
Charles, interesting indeed. That said, Srajan likes a music genre that really i'm not into (world acoustic) and his writing is often confusing. 

I will say I heard the Voxativ 9.87 in a dealer's home and wasn't impressed as his (and others) reviews. That said, I don't believe it was broken in near enough. It had wonderful jump factor, but also clear as day, uneven frequency response issues in various parts of the spectrum. The bass was also dry.

I've been toying with the idea of getting a second speaker (YG is my first) and Zu/Cube are high on that list. The Druid VI is considerably less expensive, but seems to be more of a rock n roll speaker vs a classical one. I can say previously owning Definitions that the old Zu's strengths weren't on classical. The Druid VI bridges the gap much further but still doesn't seem like that speaker's favorite genre.
I think the focus on DF is going overboard - circuit is more important. @213Cobra recently told me he believes the Ampzilla 2000, 2nd Edition is the best SS amp he’s heard on Zu Audio speakers which have similar driver characteristics to the Cubes. I was very surprised to hear this (and between him and I, we’ve owned/heard the SIT-1, 2, and 3, and 20+ other P/P and SET amps on them). My personal favorite amp on Zu is Quad ii Jubilees - which also use some negative feedback. I wouldn’t get too tripped up on DF being the decisive factor. Also, Srajan listens at 60db volume levels which is very unusual. For contrast, I want to hear the Tron (reboot by Daft Punk) soundtrack at 90dbs to test amp flexibility.

As far as trying the Nenuphar myself, I reached out to Jon and he was hoping to have stock at the end of the month. There are no places in SoCal to hear them, but he offers a generous 60-day return policy. I’m also looking into the Boenicke which I am hoping to demo soon.

I would pass on a 300b integrated with these speakers. It might “work” but won’t be optimal. 
Charles, in my high efficiency speaker experience I consider 845s or push/pull triode to be more ideal for this efficiency level. Running low watt SET at high levels yields more distortion. Ymmv.
Well guys, I heard the Boenicke W13 and it wasn’t my cup of tea. I’m now looking to hear the Nenuphar and Fyne Audio - anyone hear both? I heard the big Tannoy Westminster recently which stoked my interest in the latter.
Thanks for the kind works, @charles1dad - I’ve really tried to be honest and level with folks about what I hear without reviewer-speak. I’d love to report back on the Cubes, but would have to fly to Chicago or NY to demo. I’m a bit concerned about rock/electronica on them per Srajans comments, but have considered purchasing a pair with return policy. Recently, I very much enjoyed the efficient Fynes at a much higher price point. 
Heard them at shows only and didn’t leave any real kind of impression. I’ve heard they can shout at higher volumes so may not be for me - I was jamming Daft Punk in the 90s last night :) 

I tried to hear the Cessaro Wagner at Jeff’s, but he cancelled due to just getting back from Axpona the week before. I was bummed.