Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Planars & Exotics ESL's, planars, and alternative technologies

Experiences with Plasma tweeters?
Experiences with Plasma tweeters?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 19th October 2001, 12:23 PM   #1
MurrayP is offline MurrayP
diyAudio Member
Join Date: Oct 2001
Location: Napier, New Zealand
Hi from New Zealand.

About a month ago I had the pleasure of hearing some Acapella speakers from Germany which use plasma tweeters. These produced the only sound I have heard from speakers that I could say really sounded like live cymbals, so I'm hooked. The fact that they use
A) valves,
B) tesla coil principles
also makes them a hell of an interesting.

There is a good site on the web about peoples experiences with making these (is easy to find if you search on Google or I can find it if you need). I'm just wondering if anyone here has had a go at designing such a thing (and lived!).


  Reply With Quote
Old 19th October 2001, 04:01 PM   #2
Petter is offline Petter
diyAudio Member
Join Date: Jan 2001
Location: Scandinavia
State of the art is (still?) Plasmatronics Type 1. I almost bought a pair, kind of regret it that I did not when I had the chance. These are rare, require helium gas til function and cross over at 700Hz (switchable to 1000Hz). Very nice. I understand some homes in California have full range units integrated into the house. Watch out for ozone -- several people have had trouble with ozone poisioning. The emission of UV light is less troublesome -- sunscreen is cheap.

  Reply With Quote
Old 19th October 2001, 06:59 PM   #3
cyclotronguy is offline cyclotronguy  United States
diyAudio Member
Join Date: Sep 2001
Location: Northern California
Default Ion Cloud

Many years ago the great Nelson Pass had a speaker named the “Ion Cloud”. On his way to the urgent care facility he was laughing on how it was the ideal audiophile product…… expensive, unobtainable and toxic.
  Reply With Quote
Old 20th October 2001, 01:12 PM   #4
GRollins is offline GRollins  United States
diyAudio Member
Join Date: Feb 2001
Location: Columbia, SC
I would think it would be possible to use a sort of ventillation hood. Perhaps something like a funnel above the driver with air evacuation. It'd be a nuisance in the practical sense, but I could probably talk myself into it...after all, I never set out to have a set of water lines on my listening room floor, either, but there they are.
As cyclotronguy and I were saying backstage, I seem to recall seeing that you can make a driver using an ordinary candle flame. The carbon particles--i.e. the glowing part of the flame--supposedly are able to be coaxed into action by plates on either side. No, I haven't tried it. I suspect that it would be horrendously inefficient. But it's something I'd like to take a poke at one of these days when I have time. At least candles aren't health hazards as long as you don't set the house on fire.

  Reply With Quote
Old 21st October 2001, 01:46 AM   #5
MurrayP is offline MurrayP
diyAudio Member
Join Date: Oct 2001
Location: Napier, New Zealand
Ozone generation certainly seems to be a downfall of this type of tweeter. One web site talks of some one setting a speaker up and leaving it overnite only to arrive to bleached room in the morning. We have a little experience in making high power ozone power supplies - a little leak from a hose carrying off test generated ozone totally bleached grass around the spot it leaked from. Its nasty stuff as an oxidant(though I haven't researched its other effects on life) but the makers of Acapella speakers use some catalyst to get it to return back to O2. Obviously there is an answer since (a few) comercial tweeters are out there. A bigger problem actually I suspect would be integrating its response with a decent midrange (eg Seas excel Mg cone types)and preseving phase and linearity. Any thoughts?

  Reply With Quote
Old 22nd October 2001, 02:34 AM   #6
Yoda is offline Yoda
diyAudio Member
Join Date: Jul 2001
"Accapella's designer expained to us that he solved this problem by the use of a ceramic and bronze cathalist which converts O3 to O2. He claims that it is 100% solving the problem and that we can even sleep in the room with the music on.
quote from http://www.arduman.com/aa/Sayfalar/london00.htm
  Reply With Quote


Experiences with Plasma tweeters?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Non top-cap tubes for plasma tweeters bigwill Tubes / Valves 6 10th July 2010 02:01 PM
DIY PLASMA TWEETERS parts a333bt Swap Meet 2 14th October 2007 02:09 PM
FYI: found some Plasma tweeters on eBay Cloth Ears Swap Meet 0 18th January 2007 10:20 PM
Plasma/ion tweeters Prune Tubes / Valves 0 16th June 2004 04:31 PM
plasma tweeters luke.ellis Planars & Exotics 15 22nd November 2003 08:48 AM

New To Site? Need Help?

All times are GMT. The time now is 09:11 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio