A plasma speaker plays music just like your normal speaker but it uses an arc of electrical plasma running at 30,000 volts! Most people aren’t aware that plasma arcs can be modulated to generate sounds so your friends will be in for a surprise when you explain to them that the plasma arc IS the speaker!
Your typical speaker uses an electromagnet to vibrate small drums, but a plasma speaker uses an electrical arc to ionize and compress the air around it to play music, all with no moving parts!
Check it out on their Kickstarter page here