Corona manufactures or has manufactured the following equipment (click to expand models list):Ionic Speakers
Ulrich Haumann ( Plasma Speaker Homepage) (April 2002): This Plasma speaker was build in the rooms of Otto Braun's company around 1978. The name of the company was CORONA ACOUSTIC GmbH. The company start in 1977. In 1999 the company was closed and Mr. Braun sold the rights for his speaker to Mr. Lansche who has a little company in Konstanz.
Otto Braun sold his speakers from beginn on as OEM Versions for speaker designers, so that there were many type of different systems sold with his plasma speaker.