When entering the electric signals to the voice coil speaker or speakers to connect to the Signal amplifier audio signal is sound speaker principle is When the electrical signal enters to the magnetic lines of force occurs around the power. Of magnetic lines of force will suck and push with the lines of the permanent magnet in electric signals derived from audio frequency. The audio frequency since 20 Hz - 20 KHz. With the change of phase all the time make paper cones that adhere to the voice coil"s movement to look at, and push the air, thus a sound wave.
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