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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. dB drag racing - Wikipedia

   en.wikipedia.org/wiki/DB_drag_racing

   dB drag racing is a competition rewarding the person who can produce the loudest sound inside a vehicle. [1] [2] The "dB" means decibels of sound pressure level (SPL).In these competitions, SPL of over 140 decibels is common; and the international record in 2003 was 171.5 dB, with records as high as 180 dB claimed more recently.

4. Car Audio Sports Organizations - Wikipedia

   en.wikipedia.org/wiki/Car_Audio_Sports_Organizations

   Woofer cone surface area is measured in square inches. For example, a round 12" woofer is 113 in 2 (730 cm 2) and a square 12" woofer is 144 in 2 (930 cm 2). Power is determined by the TermLab Magnum meter. The TermLab meter is the official MECA decibel contest meter. There are 18 SP (Sound Pressure) classes and 5 Park & Pound classes.

5. 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 ...

6. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   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 ...

7. Soap Box Derby - Wikipedia

   en.wikipedia.org/wiki/Soap_Box_Derby

   The Masters racer remained the only non-kit car that racers had to fabricate from scratch until 1999, when a prefabricated Masters kit, called the "Scottie" was made available for sale. Since 1976, the top-tier Senior/Master Division cars were fully-reclined lay-down designs, while the Junior/Stock and Kit Car Division entries remained sit-ups.