Loudspeakers are really very simple devices from an operational standpoint.
An amplifier generates electrical energy that alternates constantly from positive to negative in a pattern of waves that vary in size and frequency. The output from the amplifier is connected to the speaker at the Terminal Strip. There is a fine braided wire that carries the signal from the terminals to the conductors leading to the Voice Coil Assembly. These wires are extremely flexible, to enable the Cone to move back and forth without restriction or stress, and to do so without breaking these wires. The Voice coil itself is mounted on a rigid cylinder, to which it is firmly glued.