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2. List of car audio manufacturers and brands - Wikipedia

   en.wikipedia.org/wiki/List_of_car_audio...

   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 ...

3. Antenna amplifier - Wikipedia

   en.wikipedia.org/wiki/Antenna_amplifier

   In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable. An antenna amplifier boosts a radio signal considerably for devices that receive radio ...

4. Radio receiver - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver

   The antenna may be enclosed inside the receiver's case, as with the ferrite loop antennas of AM radios and the flat inverted F antenna of cell phones; attached to the outside of the receiver, as with whip antennas used on FM radios, or mounted separately and connected to the receiver by a cable, as with rooftop television antennas and satellite ...

5. Antenna tuner - Wikipedia

   en.wikipedia.org/wiki/Antenna_tuner

   Antenna tuning is best done as close to the antenna as possible to minimize loss, increase bandwidth, and reduce voltage and current on the transmission line. Also, when the information being transmitted has frequency components whose wavelength is a significant fraction of the electrical length of the feed line, distortion of the transmitted ...

6. Subwoofer - Wikipedia

   en.wikipedia.org/wiki/Subwoofer

   From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...

7. Class-D amplifier - Wikipedia

   en.wikipedia.org/wiki/Class-D_amplifier

   The miniature loudspeaker (known as the receiver) is directly driven by a class-D amplifier to maximize battery life and can provide levels of 130 dB SPL or more. Powered speakers and active subwoofers; High-end audio is generally conservative with regards to adopting new technologies but class-D amplifiers have made an appearance [10]