Plasma ion tweeters are an evolution the “singing arc”, invented by William Duddells 1900. He basically reworked a carbon arc lamp – which were known for being fairly noisy.
Now, William found that by varying the voltage to the arc, it changed the sound that was produced…. Bingo.
Much later a fellow by the name of Siegfried Klein got involved and tuned it by putting the arc in a small quartz tube. Coupling this to a horn, he was able to produce a speaker and even a microphone. I’m really not too sure if I’d want to tempt fate by putting my mouth too close to one of those things though.
Tweeters made out of plasma arcs have a major advantage – they have no resonance or transient problems. Most audiophiles know that the lighter the material used in a speaker, the faster the response can be, and the better transients they produce. Well, plasma arcs have ZERO weight. The plasma speaker works by moving air via changing the tempurature in its chamber.
Here is an amazing video of a badass DIY plasma speaker setup. Prepare to be amazed:
At one point in the 1970′s, plasma speakers started being produced by a company called Magnat – they’re still in business, mainly producing car audio systems.
Watching the plasma speakers is pretty interesting – they start as a deep purple, and at the edges of the arc you can see them change to a deep reddish pink in the center. When the music has a lot of high frequencies, you can se the colors change in intensity. Very cool.
The main problem with these speakers is that they many need a continuous supply of ionizable gas, such as helium. The plasma has a by-product which we all know: Ozone, and if left in a closed room for long perios of time, it can reach hazardous levels!
A company called Acapella is the only company that I can find that still makes plasma speakers, and they are expensive ($23,000+), but revered for their sound quality.
Here’s another DIY plasma speaker at work. These sort of remind me of the Tesla coil speaker – once again, prepare to be amazed:
If you want to build a plasma arc speaker on your own, check out this tutorial. If you want to build your own “regular” speakers and save a ton of money, grab a copy of this.
12 Comments Received
April 30th, 2009 @1:14 pm
Pretty amazing. One question though, is this ‘Ozone’ by-product you speak of the same ozone layer surrounding the earth? A layer of gas which protects us from all sorts of nasty things, which at this point in time has a whacking great big whole in it? If so why aren’t we mass producing speaker systems like this, flooding the audio market with advanced sound clarity and pumping our atmosphere full of sweet sweet ozone?
April 30th, 2009 @7:54 pm
…………..
must……do……..
April 30th, 2009 @7:59 pm
Because, while ozone high in the atmosphere protects us from UV, ozone at ground level is toxic and causes respiratory problems.
April 30th, 2009 @8:05 pm
Because ozone is poisonous, and when produced at sea-level it doesn’t rise up to reach the ozone layer, instead it becomes a greenhouse gas.
April 30th, 2009 @9:10 pm
Oddly, these speakers sound just like my Klipsch computer speakers. Doh!
April 30th, 2009 @9:12 pm
This is awesome, but whats the sound quality? Of course it draws your attention, but will it please your ears?
May 1st, 2009 @1:01 am
The inventor and owner of Magnat in the 70′s had permanent lung damage from the effects of plasma ionization. Basically, the speakers killed him.
May 1st, 2009 @3:58 am
Those beat my Pioneers hands down and cost about 32 times as much.. at least it has plasma in its name so it’s cool anyway
July 7th, 2009 @2:57 pm
It doesn’t just have plasma in its name. It has plasma, so it’s cool.
July 21st, 2009 @4:05 pm
heh these are awesome like the ultimate speakers
January 16th, 2010 @9:10 pm
Damn those speaker designs are insane! Very cool find.
Pingback & Trackback
Leave A Reply