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A SPEAKER IS ACTUALLY A LINEAR MOTOR That's right. 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 on the frame to the conductors on the cone 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. The Voice coil itself is mounted on a rigid cylinder in the center of the cone. All the moving parts operate as a single unit, moving back and forth in the magnetic field, and are suspended by the surround, or outer edge of the cone at the front, and by the "Spider" support at the rear. At
it's natural resting point, the voice coil is centered within a narrow
magnetic Field Gap. This gap constitutes
the north and south poles of the Magnet Structure,
whose energy is derived from a powerful permanent Magnet
sandwiched between the two pole pieces. Essentially, the speaker operates
by responding to positive and negative waves from the amplifier, passing
through the voice coil, causing it to be moved back and forth by attraction
and repulsion within the high-gauss flux density of the intense magnetic
field. THINGS
THAT MAKE A DIFFERENCE IN SPEAKER QUALITY IMPORTANT
TIP! Another
important parameter is the material of which the magnet is made. Newer
speakers have magnets made of neodymium, strontium, and barium, among
other technologically advanced metal composites. Older and cheaper units
use alnico 5 and other less dense alloys that may have only one third
or less of the magnetic potential of the newer composites. Check
our Easy selection System
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