The magnet inside the speaker is auxiliary vibration, the magnet will produce a magnetic field, the speaker voice coil is placed in the magnetic field, when the voice coil through the audio current, the current will be the force of the magnetic field, so that the voice coil vibration, drive and voice coil stick together of the paper basin vibration sound.
The speaker magnets mainly have ordinary ferrite magnets and Ndfeb magnets. Speakers on actually around the magnet coil, the working principle of speaker is in using the acoustic signal into electrical signal, the conversion for the spread of the acoustic signal, when our voice into the speaker, can produce specific changes of current coil causes magnetic, and magnets attract or repel movement has certain regularity, the vibration and thus drive the paper cone vibration, Turn the sound up. So, the magnet's job is to assist vibration.