IPOD Speakers
The suspension arrangement keeps the coil centered in IPOD Speakers the gap and provides a restoring force to make the speaker cone return to a neutral locality after moving. A commonplace suspension orderliness consists of two parts: the "spider", which connects the diaphragm or roar coil to the frame and provides the majority of the restoring force; and the "surround", which helps center the coil/cone assembly and allows free pistonic high sign aligned with the magnetic gap.
Very few manufacturers use electrically powered patch coils as was common in the earliest designs. The bulk and type of magnet and details of the magnetic circuit differ, depending on chart goals. For instance, the shape of the pole piece affects the magnetic interaction between the inflection coil and the magnetic field, and is sometimes fond to modify a driver's behavior. As well, a 'shorting ring' or cap is sometimes used near the magnetic gap to reduce adverse distortion effects of elevated faddy in the exclamation coil.