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            A speaker driver, also known as a loudspeaker, comes in many types, each with different frequencies and each used differently depending on the situation at hand.  When the diaphragm of the speaker is tightened and then vibrated it will emit a higher frequency, thus a higher pitched sound.
               Likewise, a less tightened d
iaphragm will emit a lower frequency and lower pitch. When the diaphragm is larger, its response time to
the electrical signals is slower which optimizes them better for low sounding bass.
            Full range drivers means a stand alone speaker that is able to imitate all the required frequencies without the aid of other speakers. A typical size for a full range driver is about 8 inches in diameter, as it must be small enough to emit high frequencies yet large enough to produce lower frequencies. Often on these full range drivers you have "whizzers", small cones between the main diaphragm and voice coil that allow higher frequencies to be reached.
            A subset of the full range driver is the limited driver, often found in children toys or computer speakers, in which the cost is low, however the quality is poor.


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            Subwoofers produce the lowest pitched sound, oftentimes they are under 200Hz, however, more professional subwoofers can be lower than 100Hz. At this frequency of sound the waves bend more easily around objects and thus the orientation of the box that the subwoofer is enclosed is less of a problem than it would be with a more high frequency speaker(tweeter).
             The next lowest frequency speaker is the woofer, which can even be used to replace the mid-range driver, the next speaker that operates on a 1-6kHz frequency band. Lastly, we have the tweeter the highest frequency speaker, which due to its such high frequency makes it harder to propagate sound around a room.

woofers and
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