Electric speakers have been created in 1925 for 75 years, and have made great improvements in structure for a long time, so that the performance of speaker horn has been greatly improved, but the basic working principle has not changed much.
1. The force (Magnetic force) that causes the vibration of the electric loudspeaker to vibrate the force that is the magnetic field on the current carrying conductor {The force effect of the electric transducer is generally referred to as an electric transducer.} F=BLI(B: magnetic induction density Webb / M; L: indicates the length of the wire; I: Current intensity A)
2. However, once the voice coil motor, will cut magnetic lines of force in a magnetic gap, so that the voice coil induced electromotive force is generated, it is called electric transducer electrical effects.e=BLV (e: V said the induction electromotive force)
3. The force effect and the electric effect of the electric potential transducer are always the same, and the electric effect will have a great influence on the impedance of the voice coil.
4 Structure:
Vibrating plate Cone Paper A  Voice Coil  Damper  Magnet  Yoke B  Plate  Center Pole  Frame Gasket C Terminal Leader Cap