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Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed.peakers come in all shapes and sizes, enabling you to listen to music on your iPod, enjoy a film at the cinema or hear a friendâs voice over the phone.
Best Answer: The magnet is part of the 'motor' of the sub. The coil inside the magnet has alternating current running through it. The coil acts as an electromagnet and pulls itself up or pushes itself down moving the cone of the speaker.o the speaker cone will have something to be attracted to or push against, producing vibration which is then heard by your ears as sound. To a point anyway, the bigger the magnet the better the sound. There is a coil of wire at the smallest part of the speaker that acts as an electromagnet.