Different speakers working principle is not the same; the most common most typical is cone horn also known for moving coil type horn which consists of three parts:
1 vibration system, including tapered paper cone, a voice coil and the damper etc.;
2 magnetic circuit system, including the permanent magnet, the magnetic guide plate and the field core column, etc.;
The 3 auxiliary system, which comprises a frame, a wiring board, a pressing edge and a dustproof cover. When the magnetic field in the coil in the current through the audio, with audio current changes in the magnetic field, the magnetic field and permanent magnet magnetic field occur interaction, so that the voice coil along the axial vibration. Due to the horn has a simple structure, bass and plump, soft quality, wide frequency band, but its efficiency is low.
Hope that the above remarks in your use to help, you are welcome to call advisory.