Super tweeter for FullRange Driver

ENIGM Acoustics Sopranino electrostatic supertweeter

"Sopranino’s magnitude increases with decreasing frequency. However, with the 8kHz filter setting, there is a very high inductive phase angle between 7 and 12kHz, a region where the impedance magnitude drops to less than 2 ohms. This makes the Sopranino very difficult to drive at this setting"

Those tweeters are banned from import to the US. Ozone factories.

Nelson Pass on plasma tweeters
As Nelson Pass said of his massless “ion-cloud loudspeaker” described in the sidebar “[the speaker] gave new meaning to the word ‘transparency.’” And so it was with the Lansche Audio No.7. This loudspeaker’s midrange and treble reproduction was absolutely sensational, and different from that of conventional loudspeakers, whether cone, electrostatic, or ribbon. The Lansche simply disappears as a sound source, not just spatially (which it, along with many other great loudspeakers, does), but also mechanically. By that I mean the physicality of the loudspeaker’s operation—the mechanism by which is creates sound— disappears, replaced by the physicality of the instrument it is reproducing. It’s the kind of sound that produces a “fool-you” realism of timbre, as well as “fool-you” palpability and immediacy. There was an ethereal character to the sound, as though the music existed independently of any electro-mechanical contrivance—“conjured out of thin air” to use Jonathan Valin’s wonderful description.

Absolute Sound on them
The treble had the wonderful quality of being highly resolved without sounding bright. The No.7’s reproduction of cymbals, and of brushes on snares, was revelatory. The corona-plasma tweeter beautifully resolved the transient detail of the stick hitting the cymbal, the shimmer that changes character slightly as it decays, and then revealed the finest inner detail at the end of the decay. This lack of smearing of fine transient detail was spectacular and alone worth the price of admission. When combined with the top- end openness and transparency, this treble resolution produced a stunningly lifelike feeling of actually being in the same room as the instrument.

akwilson501
After some listening impressions, I’ve realized I cant live with the high frequency response these things put out by themselves. They only go to about 15k hz. and it’s made music lose its sparkle and sense of space and spacial cues.