The speaker magnet:is to provide a permanent magnetic field for the speaker
coil, which is embedded in the paper of the speaker cone. When
the audio signal flows throw the speaker coil, it generates
a small magnetic field the strength of which varies with the
strength of the audio signal. This small magnetic field is repelled
by or attracted to the permanent magnetic field produced by
the speaker magnet. Thus the paper cone moves away from or closer
towards the back of the speaker. Hence as the strength of the
audio signal wiggles the paper cone wiggles back and forth,
and you get sound waves that match the audio signal. Only the
field in front of the speaker magnet (where the speaker cone
is located) is of any use. The field that comes out the back
of the magnet serves no purpose, and you might as well use it
to stick the speaker to the fridge. Usually NdFeB magnet and
Ferrite magnet can be used as speaker magnet.
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E-mail: sz.magnet@mailcenter.com.cn China Rare Earth Magnet Co.
Addreess: 5F, Haiyun Building, Haijing Garden, OCT, Nanshan
District, Shenzhen, China.
Post Code: 518053
Tel: (86)755 26923096
Fax: (86)755 26915592
