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Some PA systems have speakers that cover more than one building, extending to an entire campus of a college, office or industrial site, or an entire outdoor complex (e.g., an athletic stadium). A large PA system may also be used as an alert system during an emergency. PA systems by size and subwoofer approach
Some head units have built-in stereo amplifiers. Other car audio systems use a separate stand-alone amplifier. Every amplifier has a rated power level sometimes noted on the head unit with the built-in amplifier, or on the label of a stand-alone unit. Coaxial speakers: These are the most common type of car speakers and are often factory-installed.
Loudspeaker enclosures range in size from small "bookshelf" speaker cabinets with 4-inch (10 cm) woofers and small tweeters designed for listening to music with a hi-fi system in a private home to huge, heavy subwoofer enclosures with multiple 18-inch (46 cm) or even 21-inch (53 cm) speakers in huge enclosures which are designed for use in ...
PA-12345 12345-PA: Front and rear plates required. Serials PA-10000 through PA-29999 issued, followed by 10000-PA onwards. [12] Official Use – Commercial PA-12345 PA-1234A Only rear plates required. Serials PA-30000 through PA-99999 issued, followed by PA-0000A onwards. [12] Omnibus: OB-12345 Current serial format began at OB-10000 in 1974. [13]
Pennsylvania car insurance laws. Pennsylvania state law requires all drivers to have auto insurance. In order to meet the minimum requirement for insurance within the state, you must have 15/30/5 ...
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This list of car audio manufacturers and brands comprises brand labels and manufacturers of both original equipment manufacturer (OEM) and after-market products generally related to in-car entertainment that already have articles within Wikipedia. While components sold by these companies have much in common with other audio applications or may ...