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| KEY INFO WEBSITES | |
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| https://plasmaspeaker.de/index.html | Top site |
| http://www.plasmatweeter.de/ | Old (but different) version of above |
| http://www.roger-russell.com/ionovac/ionovac.htm | Full History and info on Ionovacs |
| http://hillplasmatronics.com/ | Hill Plasmatronic |
| http://tmms.co.jp/EFD/ | Plasmasonic and lots more info |
| https://web.archive.org/web/20130603070617/http://ionovac.com/ | A very good but dead site, link to the wayback machine |
| https://web.archive.org/web/20030320083046/members.cox.net/jayphil/plasma.html | A dead site with some nice old info |
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| ARTICLES | |
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| https://www.psaudio.com/copper/article/the-once-and-future-tweeter/ | A nice overview article |
| https://www.stereophile.com/content/hill-plasmatronics-type-1-loudspeaker | Stereophile web version of 1980 article |
| http://www.nutshellhifi.com/library/speaker-design1.html | Some info on plasma speakers at the bottom |
| http://edgarvillchur.com/a-new-speaker-principle/ | Copy of 1952 magazine article |
| https://www.newscientist.com/article/mg15120483-200-technology-hot-throat-makes-a-safer-sound/?ignored=irrelevant | Article on the Credo tweeter |
| http://www.nutshellhifi.com/library/speaker-design1.html | Eventually talks about plasma tweeters, poor on accuracy |
| https://sudonull.com/post/20230-Plasma-Singing-Foggy-Perspectives-of-Ionophones | A nice plasma article |
| http://www.diegobarone.it/storico/Ionophone.htm | Italian DIY Version of Klein Ionophone |
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| MANUFACTURERS | |
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| http://www.acapella.de/ | Acapella (ION TW-1) |
| https://www.dukane.com/about/history/ | Dukane s history including Ionavac division |
| https://www.vaughnloudspeakers.com/products | Vaughn Loudspeakers |
| https://www.lansche-audio.com/products/plasmatweeter/ | Lansche Audio Corona Plasma Tweeter |
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| VIDEOS | |
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| https://www.youtube.com/watch?v=U20nYc8JSc0&t=216s | The Hill Plasmatronic being demonstrated |
| https://www.youtube.com/watch?v=0Pl5qBajPLk | Excellent explanation of discharges from See the Pattern |
| https://www.youtube.com/channel/UCF3J4LVij0vRYp6Mgbx1QwQ/videos | YouTube videos for plasmaspeaker.de (above) with great detail |
| https://www.youtube.com/watch?v=-L_039xLSzw | What is a plasma tweeter |
| https://www.youtube.com/watch?v=msE14cWTwKI | Nelson Pass Youtube interview |
| https://www.youtube.com/channel/UCLsUeooHSJlE_5xL4BPQIOQ | A video channel which shows the non-hifi use of plasma well |
| https://www.youtube.com/watch?v=hy-XPgWaU8M | Yvonne Sutton video from paper 2011 |
| https://www.aparat.com/v/tz1r8/Electric-Arc_Loudspeaker_%28ionophone%2C_plasma_speaker%29 | Viger Audio video |
| https://www.youtube.com/watch?v=-7Eemh63NcA | Ionic speaker demo from Stanislav Sergeev |
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| REVIEWS | |
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| https://www.audiogon.com/listings/full-range-vaughn-plasma-ii-new-plasma-tweeter-2016-04-15-speakers-94552-castro-valley-ca | Vaughn Plasma II review |
| https://www.hifitest.de/test/lautsprecher-stereo/lansche-audio-cubus-5069 | Lansche Audio Cubus Review 2011 Hifitest.de |
| https://www.stereophile.com/content/lansche-audio-51-loudspeaker | Lansche Audio 5.1 Review |
| https://news.softpedia.com/news/Plasma-a-New-Tweeter-Technology-Lansche-Audio-No-8-82971.shtml | It's new all over again (2008) |
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| FORUMS | |
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| https://www.diyaudio.com/community/ | A great forum site with various massless speaker discussions |
| https://forum.audiogon.com/discussions/the-hub-no-moving-parts-no-problem?sort_order=asc | An article/forum focused on Klein |
| https://community.klipsch.com/index.php?/topic/72366-dukane-ionovac-information/ | Forum with Ionovac details 2006 |
| https://www.audiosciencereview.com/forum/index.php?threads/debunking-the-myth-that-a-lighter-diaphragm-enables-a-faster-speaker-driver.25910/ | An in depth discussion about mass in speakers |
| https://www.hifisentralen.no/forumet/threads/plasmah%C3%B8yttaler.95851/ | A forum with some bits of info in the thread |
| https://web.archive.org/web/20190713051542/http://www.audiocircuit.com/DIY/Ionic-Speakers | Some brief bits of info (dead site, archive link) |
| https://forums.stevehoffman.tv/threads/corona-plasma-tweeter.386189/ | On the Lansche Corona tweeter |
| https://www.audiokarma.org/forums/index.php?threads/unusual-speaker-designs.494299/ | Various odd speakers |
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| EARLY HISTORY | |
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| http://www.douglas-self.com/MUSEUM/COMMS/auxetophone/auxetoph.htm | A site on the Auxetophone (not quite massless) |
| https://blog.sciencemuseum.org.uk/pyrophone1/ | Good history of the pyrophone |
| https://120years.net/wordpress/the-singing-arcwilliam-duddeluk1899/ | Site with early electronic music history |
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| OTHER | |
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| https://www.gofundme.com/f/hear-the-legendary-plasma-speakers-at-axpona-2023 | If you want to see the Hill Plasmatronic |
| https://www.diyaudio.dk/2012/09/ionplasmacorona-wind-loudspeaker.html | Some nice pics |
| https://everything2.com/title/Massless+Speakers | A brief general info page |
| https://en.wikipedia.org/wiki/Plasma_speaker | Wikipedia s main section, varies in accuracy |
| http://magnat.tv/n4.shtml | Old page on a diy Magnat clone |
| https://www.kickstarter.com/projects/excelphysics/the-arc-plasma-speaker | ExcelPhysics Kickstarter (2014, main site now gone) |
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| Tomorrows World arch 8 1984 | |
