IPOD Speakers
Very few manufacturers applicability electrically powered field coils as was average in the earliest designs. The size and type of magnet and details of the magnetic circuit differ, depending on design goals. For instance, the shape of the pole piece affects the magnetic interaction between the voice coil and the magnetic field, and is sometimes used to modify a driver's behavior. As well, a 'shorting ring' or cap is sometimes not new near the magnetic gap to reduce adverse distortion effects of high current in the song coil.
A mid-range speaker is a loudspeaker driver which reproduces middle frequencies. Mid-range drivers can be mythical of papery or composite materials, or be compression drivers. If the mid-range driver is cone-shaped, it can be mounted on the front baffle of a loudspeaker enclosure, or it can be mounted at the throat of a horn IPOD Speakers for added output level and discipline of radiation pattern. If it is a compression driver, it is invariably mated to a horn.