Basic materials to make a simple DIY speaker:
- Conductive wire
- An amplifier with battery
- An non-conductive lightweight material
- An input source
- Stack of magnets. The more the better.
- wire tape
- alligator clip or soldering equipment
When you play the music from an input source, the electronic signals turn into to current that run through the the wires, and creates an electromagnetic field. Because the amount of current is not constant all the time and they keep reverse the poles of the electromagnet. Because the opposite poles repel each other and the same poles repel each other, this electromagnetic field created between the magnets and the wires cause the wire to vibrate, eventually causing the lightweight material to move too.
A good guide and example of a simple DIY speaker. Note that the person chooses to use a stationary magnet and wire coiling around it, but these two parts can also be separated upon the purpose of your project. He also uses a plastic plate here, but there are still many other material choices available.http://www.instructables.com/id/How-to-Build-a-Simple-Speaker/
Other interesting approaches:
-http://makezine.com/projects/plasma-arc-speaker/ (Plasma arc speaker, ideally weightless vibrant gaseous diaphragm that can respond to high frequency sound signals)
At current stage, I’m able to make a simple DIY speaker from a plastic plate, cooper wire, a amplifier and several magnets. The music created by this simple speaker has very low volume and you need to have it by your ear in order to hear its mild sound. The music is also not clear, as the radio turning sound created blurs out the actual music. Most of the music are reduced to be the simple melody and you can’t distinguish the human voice, instrumental sound or other affects anymore. In a way, it becomes a barrier between the music and the listener, while it also function as a simplification of the music as it helps the listener focus on the most basic yet important part of the work. Despite being a tool of the transmission of music, the special experiences provided by these low-tech speakers functions as a test for the sound/music listener on whether they are really paying attention to certain details in the sound as they thought so.