Cube Audio Cube Audio Nenuphar V2

Icon of modern wideband: a single 10" driver without a crossover per speaker, exemplary temporal coherence, holographic soundstage, and highly legible dynamics, designed for low-power/high-quality amplifiers. I'm selling them with their Viva Solista 845 amplifier to upgrade to a Grimm LS1be active system due to space constraints.

Technical Specifications
* Architecture: 1-way, no crossover; TQWT (tapered quarter-wave) enclosure with bottom port.
* Driver: Cube Audio F10 Neo (V2 10"), ~2.4T high-density neodymium magnet, underhung voice coil, dual whizzer; ±3 mm effective excursion.

* Performance (depending on V2): sensitivity ~92–93 dB/1 W/1 m, typical frequency response ~30 Hz–18 kHz; V2 = tighter bass, extended treble, smoother upper midrange.

* Size/Finish: approx. 30×50×105 cm, ~40 kg/piece; piano lacquer (depending on finish).

* Binding posts: WBT, single-wiring; manufactured and assembled in Poland.

Awards & Press Reviews (excerpts)
* 6moons: Lunar Eclipse Award (very rare) for Nenuphar; highlighted the wall-to-wall soundstage, definition, and compatibility with SIT/triode amplifiers. 6moons.com
* Mono & Stereo: “Highly Recommended Product Award 2021” for Nenuphar; captivating midrange, pronounced holography. monoandstereo.com
* Stereophile / Show Reports: noted pairings with First Watt SIT-3 and DHT triodes; very resolving and pure sound reproduction. stereophile.com
* HiFi Knights: “one of the best” filterless systems heard; Usage measurements and dimensions confirmed. HiFi Knights+1

Sonic advantages (vs. conventional multi-way speakers)
* Time and phase coherence: true point source (single driver) → stable image, fine focus, legible micro-dynamics. 6moons.com
* Controlled and natural directivity: continuous attack/release, very embodied vocals and strings, few filtering artifacts. monoandstereo.com
* Surprising bass for a full-range driver (optimized TQWT loading); V2 provides more foundation and extension. Stereo Times -+1

Recommended pairings (amplifier types)
Personally, I prefer 845 tube amplifiers, which are neutral and greatly open up the soundstage. The bass is absolutely magnificent with my Viva Audio Solista 845, which I'm also selling!

* Single-ended triodes (SET) 45 / 2A3 / PX4 / 300B (2–10 W, low/zero negative feedback): rich, fluid, very good microdynamics; a recurring recommendation. Typical brands: Tektron, Sun Audio, Elekit, Line Magnetic (ref. SET). monoandstereo.com

* Class A triodes 845/211: more headroom and bass control; ensure there is no excessive negative feedback. (Synergies vary depending on damping.) [Press/manufacturer consensus] monoandstereo.com

* “Triode-like” transistors (First Watt SIT-1/SIT-3, Class A, low NFB): high resolution, density and airiness similar to triodes, a very good match. 6moons.com+26moons.com+2
* Modern Class A solid-state amplifiers (Pass/First Watt & similar): quiet operation, control, and neutrality; best suited for moderate power levels rather than very powerful amplifiers/high NFB. monoandstereo.com

For the buyer (use & room)
* Target rooms: ~20–40 m²; flexible placement, slight toe-in (5–10°), can be positioned closer to the back wall depending on the room. monoandstereo.com

* Power output: from 3–8 W of very good quality (SET/Class A), or “SIT-like” transistors. monoandstereo.com

Condition / contents (to be completed)
* Condition: Excellent + upgraded spikes with more attractive and higher-performing Eden Sound spikes. * Finish: White lacquered
* Accessories: tips/original packaging (wooden cases)
* 1st invoice on request
* Listening possible in Lille

Cube Audio speakers are known for their exceptional liveliness, among other things. So if you love lively, groovy sound with excellent tonal performance, this is the right choice for you. Quote from Peter Breuninger, a well-known reviewer in the USA, on Cube Audio: ‘With a complete system for less than $25,000, you have a system that can compete with multi-million dollar"