Putting all the pieces together

In a dynamic speaker, electrical signals from an external source are brought to the speaker through speaker wire which coil around the voice coil. This current as you may know creates an electromagnet thus creating a magnetic field. This voice coil is then connected to the diaphragm, a flexible material often times made of paper or plastic, which is in turn connected to the metal outer basket frame. Depending on the orientation of the permanent magnet, the voice coil will be either repelled or drawn closer to the magnet pulling or pushing the diaphragm with it, thus vibrating the air into a noise that we can perceive with our ears.