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audio subwoofer

Comprehensive Analysis

1) "Audio" -- As to audio subwoofer 1au·dio Pronunciation: 'o-dE-"O Function: adjective Etymology: audio- 1 : of or relating to acoustic, mechanical, or electrical frequencies corresponding to normally audible sound waves which are of frequencies approximately from 15 to 20,000 hertz 2 a : of or relating to sound or its reproduction and especially high-fidelity reproduction b : relating to or used in the transmission or reception of sound -- compare VIDEO c : of, relating to, or utilizing recorded sound Pronunciation Symbols A U.S. Postage Stamp commemorating one hundred years of sound recording. Sound recording and reproduction is the electrical or mechanical inscription and re-creation of sound waves, usually used for the voice or for music. The two main classes of sound recording technology are analog recording and digital recording. 1 The cylinder phonograph 2 The disc 3 Electrical recording 4 Other recording formats 5 Magnetic tape 6 Stereo and Hi-fi 7 The Fifties and beyond 8 Digital recording 9 See also 10 Notes The first practical sound recording and reproduction device was the mechanical cylinder phonograph, invented by Thomas Edison in 1877 and patented in 1878, and in some ways resembled the phonoautograph patented by Edouard-Leon Scott de Martinville in 1857. The invention soon spread across the globe and over the next two decades the commercial recording, distribution and sale of sound recordings became a growing new international industry, with the most popular titles selling millions of units by the early 1900s. The development of mass-production techniques enabled cylinder recordings to become a major new consumer item in industrial countries and the cylinder was the main consumer format from the late 1880s until around 1910. The next major technical development was the invention of the gramophone disc, generally credited to Emile Berliner and commercially introduced in the United States in 1889. Discs were easier to manufacture, transport and store, and they had the additional benefit of being louder (marginally) than cylinders, which by necessity, were single-sided. Sales of the Gramophone record overtook the cylinder ca. 1910, and by the end of World War I the disc had become the dominant commercial recording format. In various permutations, t..." 2) "Subwoofer" -- As to audio subwoofer sub·woof·er Pronunciation: 's&b-'wu-f&r Function: noun : a loudspeaker responsive only to the lowest acoustic frequencies Pronunciation Symbols 12" subwoofer speaker A subwoofer is a type of driver dedicated to the reproduction of bass frequencies, typically from about 20 Hz to perhaps 200 Hz in cone speakers, and in the case of a rotary woofer, all the way down to below 1 Hz. It is difficult for small loudspeakers in typical enclosures to reproduce frequencies below about 40-50 Hz, especially at high output levels (say, above 100 dB), as their cones must farther than any practical driver construction can provide for, and so it is often advantageous to use a loudspeaker specifically designed for handling low frequencies at high power levels. 1 History 2 Overview 2.1 Active and passive 3 Applications 3.1 Professional audio 3.1.1 Concerts 3.1.2 Films 3.2 Home audio 3.3 Car audio 3.3.1 Non-circular subwoofers 4 Stereo separation 5 References 6 See also 7 External links The first subwoofer was developed during the 1970s by Ken Kreisel, current president of Miller & Kreisel Sound Corporation in Los Angeles. Kreisel's business partner, Jonas Miller, owned a high-end audio store in Los Angeles, and customers of some of the highest quality electrostatic speakers complained about a reduction of bass response in the electrostatics, compared to conventional loudspeakers; Kreisel's solution was to design a powered loudspeaker that would reproduce only those frequencies that were too low for the electrostatic speakers to convey and thereby fill in the missing sonic information.[1]. Infinity's full range electrostatic speaker system of about the same time also used a subwoofer to cover the lower freque..." 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