When an electrical signal is applied to the voice coil, a magnetic field is chimerical by the electric in vogue in the coil IPOD Speakers which thus becomes an electromagnet. The coil and the driver's magnetic fixed order interact, generating a mechanical impetus which causes the coil, and so the attached cone, to ploy astern and forth and so reproduce sound under the control of the applied electrical signal coming from the amplifier. The following is a description of the individual components of this type of loudspeaker.
Modern driver magnets are almost always permanent and made of ceramic, ferrite, Alnico, or, deeper recently, neodymium magnet. A common trend in design, due to increases in transportation costs and a doting for smaller, flatboat devices (as in many down home theater multi-speaker installations), is the use of neodymium magnet instead of ferrite types.