Changes

===Midrange===

===Midrange===

Midrange speakers produce, as the name suggests, sounds in the approximate middle of the auditory range.  For many purposes, these are the speakers which are used most, since many sounds are neither very high nor very low.  However, these alone are not enough to represent sound properly without losing quality.  These speakers are much smaller than woofers, but still larger than tweeters.<ref name="howstuffworks7">http://electronics.howstuffworks.com/speaker7.htm Retrieved September 30, 2016</ref>

Midrange speakers produce, as the name suggests, sounds in the approximate middle of the auditory range.  For many purposes, these are the speakers which are used most, since many sounds are neither very high nor very low.  However, these alone are not enough to represent sound properly without losing quality.  These speakers are much smaller than woofers, but still larger than tweeters.<ref name="howstuffworks7"/>

===Tweeters===

===Tweeters===

Tweeter drivers produce high-pitch sounds, such as bird calls like the name suggests.  These are the smallest kind of speaker driver, and for this reason are often fit into speaker cases last, since they can fill the physical gaps.<ref name="howstuffworks7">http://electronics.howstuffworks.com/speaker7.htm Retrieved September 30, 2016</ref>

Tweeter drivers produce high-pitch sounds, such as bird calls like the name suggests.  These are the smallest kind of speaker driver, and for this reason are often fit into speaker cases last, since they can fill the physical gaps.<ref name="howstuffworks7"/>

===Circuitry===

===Circuitry===

===Planar magnetic===

===Planar magnetic===

Planar magnetic speakers are very similar to electrostatic speakers, since they use a similar design with a metal ribbon suspended between two plates.  However, the surrounding plates are permanently magnetized rather than electrically charged.  This kind of speaker also produces high-frequency sound.<ref name="howstuffworks11">http://electronics.howstuffworks.com/speaker11.htm Retrieved September 30, 2016</ref>

Planar magnetic speakers are very similar to electrostatic speakers, since they use a similar design with a metal ribbon suspended between two plates.  However, the surrounding plates are permanently magnetized rather than electrically charged.  This kind of speaker also produces high-frequency sound.<ref name="howstuffworks11"/>

==References==

==References==