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Acoustic Research
Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX. Acoustic Research was known for the AR-3 series of speaker systems, which used the acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency Loudspeaker#Driver design: dynamic loudspeakers, drivers. AR's line of acoustic suspension speakers were the first loudspeakers with relatively flat response, extended bass (sound), bass, wide Acoustic dispersion, dispersion, small size, and reasonable cost. The AR Turntable remains a highly sought vinyl record player. Company history Acoustic Research, Inc. ("AR") was founded in 1954 by Sound recording and reproduction, audio pioneer, writer, inventor, researcher and audio-electronics teacher Edgar Villchur and his student, Henry Kloss. AR was established to produce the United States dollar, US$185 () model AR-1, a loudspeaker design incorporating the acoust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Private Company
A privately held company (or simply a private company) is a company whose Stock, shares and related rights or obligations are not offered for public subscription or publicly negotiated in their respective listed markets. Instead, the Private equity, company's stock is offered, owned, traded or exchanged privately, also known as "over-the-counter (finance), over-the-counter". Related terms are unlisted organisation, unquoted company and private equity. Private companies are often less well-known than their public company, publicly traded counterparts but still have major importance in the world's economy. For example, in 2008, the 441 list of largest private non-governmental companies by revenue, largest private companies in the United States accounted for $1.8 trillion in revenues and employed 6.2 million people, according to ''Forbes''. In general, all companies that are not owned by the government are classified as private enterprises. This definition encompasses both publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equal Opportunity
Equal opportunity is a state of fairness in which individuals are treated similarly, unhampered by artificial barriers, prejudices, or preferences, except when particular distinctions can be explicitly justified. For example, the intent of equal employment opportunity is that the important jobs in an organization should go to the people who are Meritocracy, most qualified – persons most likely to perform ably in a given task – and not go to persons for reasons deemed arbitrary or irrelevant, such as circumstances of birth, upbringing, having well-connected Nepotism, relatives or Cronyism, friends, Religious discrimination, religion, Sexism, sex, ethnicity, Racism, race, caste, or involuntary personal attributes such as Ableism, disability, Ageism, age. According to proponents of the concept, chances for advancement should be open to everybody without regard for wealth, status, or membership in a Social privilege, privileged group. The idea is to remove arbitrariness from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard Square
Harvard Square is a triangular plaza at the intersection of Massachusetts Avenue (Boston), Massachusetts Avenue, Brattle Street (Cambridge, Massachusetts), Brattle Street and John F. Kennedy Street near the center of Cambridge, Massachusetts, Cambridge, Massachusetts, United States. The term "Harvard Square" is also used to delineate the business district and Harvard University surrounding that intersection, which is the historic center of Cambridge. Adjacent to Harvard Yard, the historic heart of Harvard University, the Square (as it is sometimes called, locally) functions as a commercial center for Harvard students, as well as residents of western Cambridge, the western and northern neighborhoods and the inner suburbs of Boston. The Square is served by Harvard (MBTA station), Harvard station, a major Massachusetts Bay Transportation Authority, MBTA Red Line (MBTA), Red Line Rapid transit, subway station and a bus transportation hub. The name "Harvard Square" can also refer to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive with a respective county. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of finance and commerce, culture, technology, entertainment and media, academics, and scientific output, the arts and fashion, and, as home to the headquarters of the United Nations, international diplomacy. With an estimated population in 2024 of 8,478,072 distributed over , the city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the nation's second-most populous city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Central Terminal
Grand Central Terminal (GCT; also referred to as Grand Central Station or simply as Grand Central) is a commuter rail terminal station, terminal located at 42nd Street (Manhattan), 42nd Street and Park Avenue in Midtown Manhattan, New York City. Grand Central is the southern terminus of the Metro-North Railroad's Harlem Line, Harlem, Hudson Line (Metro-North), Hudson and New Haven Lines, serving the northern parts of the New York metropolitan area. It also contains a connection to the Long Island Rail Road through the Grand Central Madison station, a rail terminal underneath the Metro-North station, built from 2007 to 2023. The terminal also connects to the New York City Subway at Grand Central–42nd Street station. The terminal is the List of busiest railway stations in North America, third-busiest train station in North America, after New York Penn Station and Toronto Union Station. The distinctive architecture and interior design of Grand Central Terminal's station buildi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mezzanine (architecture)
A mezzanine (; or in Italian, a ''mezzanino'') is an intermediate floor in a building which is partly open to the double-height ceilinged floor below, or which does not extend over the whole floorspace of the building, a loft with non-sloped walls. However, the term is often used loosely for the floor above the ground floor, especially where a very high-ceilinged original ground floor has been split horizontally into two floors. Mezzanines may serve a wide variety of functions. Industrial mezzanines, such as those used in warehouses, may be temporary or semi-permanent structures. In Royal Italian architecture, ''mezzanino'' also means a chamber created by partitioning that does not go up all the way to the arch vaulting or ceiling; these were historically common in Italy and France, for example in the palaces for the nobility at the Quirinal Palace. Definition A mezzanine is an intermediate floor (or floors) in a building which is open to the floor below. It is placed half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tweeter
A tweeter or treble speaker is a special type of loudspeaker (usually dome, inverse dome or horn-type) that is designed to produce high audio frequencies, typically from 2,000 to 20,000 Hertz, Hz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs, after which low-frequency drivers are named (woofers). Operation Nearly all tweeters are electrodynamic drivers using a voice coil suspended within a fixed magnetic field. These designs operate by applying current from the output of an amplifier circuit to a coil of wire called a voice coil. The voice coil produces a varying magnetic field, which works against the fixed magnetic field of a permanent magnet around which the cylindrical voice coil is suspended, forcing the voice coil and the diaphragm attached to it to move. This mechanical movement resembles the waveform of the electronic signal supplied from the amplifier's output to the voice co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woofer
A woofer or bass speaker is a technical term for a loudspeaker driver designed to produce low frequency sounds, typically from 50 up to 200 Hz. The name is from the onomatopoeic English word for a dog's deep bark, " woof" (in contrast to a '' tweeter'', the name used for loudspeakers designed to reproduce high-frequency sounds, deriving from the shrill calls of birds, " tweets"). The most common design for a woofer is the electrodynamic driver, which typically uses a stiff paper cone, driven by a voice coil surrounded by a magnetic field. The voice coil is attached by adhesives to the back of the loudspeaker cone. The voice coil and the magnet form a linear electric motor. When current flows through the voice coil, the coil moves in relation to the frame according to Fleming's left hand rule for motors, causing the coil to push or pull on the driver cone in a piston-like way. The resulting motion of the cone creates sound waves, as it moves in and out. At ordinary sound ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KLH (company)
KLH Audio is an American audio electronics company based in Noblesville, Indiana. Originally founded in 1957 as KLH Research and Development Corporation in Cambridge, Massachusetts, the company takes its name from the initials of its founders: Henry Kloss, Malcolm S. Low, and Josef Anton Hofmann. History The original aim of the company was to design and produce loudspeakers in speaker enclosures. KLH had sales of $17 million, employed over 500 people and sold over 30,000 speakers a year before it was sold to Singer Corporation in 1964. In 1970, KLH became a wholly-owned subsidiary of Electro Audio Dynamics (EAD) of Great Neck, New York. EAD moved KLH's headquarters to Canoga Park, Los Angeles, in 1980. Japanese conglomerate Kyocera acquired KLH in 1982, and production was shifted overseas. Kyocera later decided to stop manufacturing audio products, and sought a buyer for the KLH brand. In 1989, KLH was acquired by Wald Sound of Sun Valley, Los Angeles. In 2003, Sony file ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Consumer Reports
Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy. Founded in 1936, CR was created to serve as a source of information that consumers could use to help assess the safety and performance of products. Since that time, CR has continued its testing and analysis of products and services, and attempted to advocate for the consumer in legislative and rule-making areas. Among the reforms in which CR played a role were the advent of Seat belt legislation, seat belt laws, exposure of the Health effects of tobacco, dangers of cigarettes, and more recently, the enhancement of consumer finance protection and the increase of consumer access to quality health care. The organization has also expanded its reach to a suite of digital platforms. Consumer Reports Advocacy frequently supports environmental causes, inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prototyping
A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and software programming. A prototype is generally used to evaluate a new design to enhance precision by system analysts and users. Prototyping serves to provide specifications for a real, working system rather than a theoretical one. Physical prototyping has a long history, and paper prototyping and virtual prototyping now extensively complement it. In some design workflow models, creating a prototype (a process sometimes called materialization) is the step between the formalization and the evaluation of an idea. A prototype can also mean a typical example of something such as in the use of the derivation prototypical. This is a useful term in identifying objects, behaviours and concepts which are considered the accepted norm and is analogous with terms such as stereotypes and archetypes. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bass Reflex
A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port. This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical sealed- or closed-box loudspeaker or an infinite baffle mounting. A ''reflex port'' is the distinctive feature of this popular Loudspeaker enclosure, enclosure type. The design approach enhances the reproduction of the lowest frequency, frequencies generated by the woofer or subwoofer. The port generally consists of one or more tubes or pipes mounted in the front (Loudspeaker enclosure, baffle) or rear face of the enclosure. Depending on the exact relationship between driver Thiele/Small, parameters, the enclosure volume (and filling if any), and the tube cross-section and length, the efficiency can be substantially improve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
