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head unit

   Also found in: Acronyms, Wikipedia 0.02 sec.

The control center and user interface for an automobile's entertainment center, which typically resides in the center of the dashboard. It provides the main controls for the radios (any combination of AM, FM, XM, Sirius, HD Radio) as well as a CD/DVD player, GPS navigation, Bluetooth cellphone integration, hard disk storage for music and iPod connector. There may be auxiliary controls on the steering wheel.

Self Contained
The head units have their own amplifiers for powering the speakers, but may have optional outputs for more powerful, stand-alone amplifiers. After market products typically have the most flexibility, although head units in luxury cars have very elaborate audio systems.

After Market Head Unit
This Eclipse model replaced the original equipment AM/FM/CD head unit in this 2006 Toyota truck, but the speakers were not changed. The Eclipse added GPS navigation, DVD and MP3 playback and external A/V playback. Plugged into the VTR jacks (not shown in picture), a portable DVD player or camcorder can play video on the system, or an MP3 player can play its music.


Out of the Vehicle
The Eclipse after market navigation system on the left replaced the Honda factory head unit on the right.



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The projection TV, compact Video / K2 Audio system, and mobile A/V head unit were named best of the year in their categories.
JVC Earns Top European Prizes in Three EISA and One TIPA Divisions by JCN Newswires
Damato points out that oftentimes when aftermarket audio is installed in vehicles, functions like door chimes and steering wheel audio controls cease to work because they're routed through the OE head unit.
Delphi's domestic strategy: while Delphi will continue to work at ... by Whitfield, Kermit / Automotive Design & Production
The two-year-old bin was equipped with a pressure-controlled power sweep head unit that was not running due to the weight of the corn.
Farm Safety by Freiberg, Karen / Farm Journal
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