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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.
Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.
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 ...
A class-D amplifier with moderate output power can be constructed using regular CMOS logic process, making it suitable for integration with other types of digital circuitry. Thus it is commonly found in System-on-Chips with integrated audio when the amplifier shares a die with the main processor or DSP.
Polk Audio, Inc. is an American manufacturer of audio products best known for its home and automobile speakers. The company also produces a wide range of other audio products, such as amplifiers and FM tuners. The company's headquarters is in San Diego, California. In 2006, it was bought by Directed Electronics. [1]
High-voltage audio amplifiers have almost become a one chip solution. For example, National Semiconductor 's LME49810 [ 7 ] (and similar products LME49811 [ 8 ] and LME49830 [ 9 ] ) can output 100 V peak to peak signals, but have relatively low current output, so a standard circuit includes a Darlington or FET discrete output stage.