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JansZen Audio

Electrostatic Purity from the Originators of the First Practical Electrostatic Speaker

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JansZen was established in 1955, when Arthur A. Janszen launched the first practical embodiment of an electrostatic speaker called the 1-30. It was a wide-range, push-pull tweeter array (800 Hz - 30 kHz) that was paired with such speakers as the AR-1. The technology was licensed to Neshaminy Electronic in 1959 and then JansZen Electrostatic in 1971, for production of the 1-30 and development of a series of full range hybrid speakers. AAJ moved on to KLH in 1959, where his full range electrostatic design was put into production as its flagship Model Nine. In 2005, son David Janszen picked up the torch and began developing and manufacturing speakers based on his new tweeter design. Like the earlier JansZen speakers, these are fully enclosed and can be placed near the front wall, yet provide that electrostatic clarity, purity, and naturalness that is unavailable from any other types of speaker. Here at the 2026 CAF, David will be debuting the first production pair of the Nine.Five. This is modeled in appearance after the beautiful, venerable KLH Model Nine, but is updated in every imaginable way -- six 8" ceramic cone woofers make far more bass than the electrostatic woofers of the original were able to. A large, synthetic aperture, line array electrostatic handles the entire midrange and treble from 300 Hz up, covering more spectrum at far higher SPL than the original 4" tweeter could manage. This unique design has wide dispersion, eliminating the usual head-in-vise issue of other electrostatics, and the integration of the two driver types acts like a single driver. The Nine.Five delivers the natural, spacious listening experience that only an electrostatic can, and includes deep, palpable bass. You may want to know that AGD's latest amplification, the Allegro, supplies the effortless, clean power.