My friend in Italy got the Nenuphars and has been been overwhelmed with the sound of them. I got their little brothers, the Jazzon, after hearing them at Axpona.
My first tube amp was a Viva Solista Lt - a 845 SET with 6SN7 driver. The Viva Solista Lt produces more than 8 watts that many 300B amps advertise for, but only marginally more.
I had the amp for 6-7 years. Out of curiosity, I tried tube push-pull amps from very reputable brands during those years and found that I much prefer Viva each time!
I understand. One of the most intriguing systems I have ever heard was powered by the Viva. Oddly a set of Millennium electrostatic. A ridiculous combination. But, it’s incredible emotional connection brought tears to my eyes. I never forgot it.
Nearly thirty years later I have a 300B headphone system and an all ARC Reference main system that captures the magic and emotional connection that the Viva did, but with warm and realistic details. Wow, it took so long to get here.
The Nenuphar is an interesting speaker. The Nenuphar Basis is a great speaker (full range driver plus powered woofer). The Basis has more weight and midbass fulness than the Nenuphar that makes the speaker very good with large scale classical music. The Nenuphar is, like many full-range speakers, is slightly rough and peaky sounding while the Basis is smoother sounding (full-range drivers used in multi-way system often sound smoother).
One of the best single driver system I’ve heard are the Charney Companion with the AER driver option. I heard this speaker, which is about 100 db/watt efficient, driven by a 300b SET. I also liked a Songer fullrange system that utilized a field coil driver. I believe it is quite high in efficiency. These two single driver systems are rare in that they sound smooth while retaining the liveliness of such systems.