How a Speaker works detailed

The key working components of a loudspeaker are shown in the diagram below. When an electrical
current passes through a wire coil (the voice coil) in a magnetic field, it produces a force which varies with the
current applied. The cone, connected to the voice coil, moves in and out, creating waves of high and low air
pressure.

The coil and magnet assembly are the ‘motor structure’ of the loudspeaker. The movement is controlled by the loudspeaker’s suspension which comprises the cone surround and the ‘spider’. The surround and spider allow
the coil to move freely along the axis of the magnet’s core (or ‘pole’) without touching the sides of the magnetic
gap.

Eminence technology and proprietary materials mean that age-old ‘compromises’ of durability against sensitivity,
or power handling against precision of response, are more easily solved than you might imagine.

Heatsinks: In the quest for higher power density (more power and hence more sound from less space),
Eminence has progressively introduced heatsink components to selected transducers e.g. cast frame neodymium products and Kilomax. The heatsinks pass through the pole of the transducer or are incorporated into the chassis
of the loudspeaker to transfer heat away from the coil. The air currents caused by the cone movement cool the heatsink.

(from Eminence Speaker)

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2 Responses to How a Speaker works detailed

  1. walter February 17, 2011 at 9:53 am #

    i have a mutant x woofer it is not working properly if you push the center down a bit it will start to play and when you let it go it stop is it costly to repaier or get anather
    the dust cover has a small crack in the center

  2. cathy June 4, 2014 at 10:15 am #

    This can be caused by an bad connection from the voice coil wire to the pigtail lead, an intermittent voice coil, or a bad glue bond. It is hard to tell without having the speaker in house to work on.

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