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
I’m looking for something that’s going to maximize the qualities of the speakers
@abd1 I’d start by learning how your system sounds with the Tektron EL-84s driving your Nenuphars. That may (will) help inform next steps...

If you have regrets letting your LTA amp go, I suggest bringing in a new unit to test with the Nenuphars, after the Nenuphars have 200+ hours on them. I’m not encouraging you to do so, but LTA has a generous return policy should you need to use it.

Don Sachs’ preamps are very well regarded, therefore going amplifier only (versus an integrated) is certainly an option. An integrated option is totally fine as well.

The Ayon Audio Crossfire PA Stereo amplifier is one of my own top choices to tease out how a higher power output design (30 watts) compares to my 2A3 amps (3.5 watts).

Member @mikeg used the Ayon Odin III amp in his review and is familiar with the Ayon line. I suggest reaching out to him for insight and advice, if Ayon is an option.

I concur with the entirety of Charles’ preceding post. To reinforce one point, lower output amps do not generate much heat. My solid state class A amps have been the worst offenders, when it comes to heat generation.

Final point: consider your system as a whole (panel box forward through to your room)... not just the amplifier - speaker pairing... to inform and guide your choices.

Based on reading through your posts, it’s clear you know what you are doing. Trust yourself.
Thanks for the info, I'm open to all suggestions. In terms of damping factor, I've been reading that I should look for an amp with little to no damping and 0 negative feedback. One amp I am considering is the Canary Audio M-90. It's a push/pull 300b, 24 wpc (which seems like plenty), but the damping factor is rated at 10. Is that low enough for the Nenuphars? I'm definitely not set on this amp, or any, just trying to refine a list of options so trying to determine if this amp should go on the list. Thanks.
The damping factor is rated at 10. Is that low enough for the Nenuphars?

Yes, it is low enough. Quite good, actually.
Yes, it is low enough. Quite good, actually.

Is there a number I should be considering as the max for damping? I don't really understand the damping rating in amps so if I had a threshold that you recommend I do not cross that would help.

I'm definitely going to start with the little EL-84 Tektron. It's around 10-15 watts and I'm using it right now with some 99db efficient speakers and it has no problem with output. I'm going to test it with some 85db standmounts that I have just to see how it handles them. Keep in mind I paid $1400 for this amp so I'm curious to see how it scales up with more expensive speakers. But it hits a lot of spots I like.... uses tubes, handmade, good quality parts, quiet (no hum or buzz), small footprint, good imaging and spacious sound, good dynamics and detail, smooth even sound (nothing sounds out of proportion), looks good (happy wife) in an artisan/eclectic kind of way. I plan on using this initially while I search for more a flagship amp and then putting this in my office. I'm curious to try a 300b amp, either SET or PP. But I'm pretty open as long as it has the tube magic I love, looks good, and fits in my space.

I believe in quality parts, monoblocks, and overbuilt power supplies, but also simple, well-known circuits without negative feedback that can be implemented cheaply. Most of those set circuits were fully detailed/explored decades ago and modern flagships are just very careful/thoughtful instantiations. All that's to say that you may find your little tekton hanging right along with much more expensive offerings.