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Denon Dl103
Denon DL103 is an MC (moving coil) phono cartridge made by DENON company. The DL103 was designed for professional broadcast use in 1962 using the arms and turntables of the day. Production has continued uninterrupted since then. There are available different versions upgraded by other companies or individuals involved in DIY audio. Technical Specification * Stylus: 16.5 μm diamond spherical tip * Cantilever: Aluminum * Frequency Response: 20 ~ 45 kHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that on ... * Output: 0.3 mV at 50 mm/s * Output Impedance: 40 Ω * Load Impedance: 100 Ω * Channel Separation: Over 25 dB at 1 kHz * Compliance: 5 x 10–6 cm/dyne (100 Hz) * Tracking Force: 2.3 ~ 2.7g (± 0.3g) * Weight: 8.5 grams Despite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Cartridge
A magnetic cartridge, more commonly called a phonograph cartridge or phono cartridge or (colloquially) a pickup, is an electromechanical transducer that is used to play records on a turntable. The cartridge contains a removable or permanently mounted stylus, the tip - usually a gemstone, such as diamond or sapphire - of which makes physical contact with the record's groove. In popular usage and in disc jockey jargon, the stylus, and sometimes the entire cartridge, is often called the needle. As the stylus tracks the serrated groove, it vibrates a cantilever on which is mounted a permanent magnet which moves between the magnetic fields of sets of electromagnetic coils in the cartridge (or vice versa: the coils are mounted on the cantilever, and the magnets are in the cartridge). The shifting magnetic fields generate an electrical current in the coils. The electrical signal generated by the cartridge can be amplified and then converted into sound by a loudspeaker. History Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Denon
is a Japanese electronics company started in 1910 by Frederick Whitney Horn, an American entrepreneur. Denon produced the first cylinder audio media in Japan and players to play them. Decades later, Denon was involved in the early stages of development of digital audio technology, while specializing in the manufacture of high-fidelity professional and consumer audio equipment. Denon made Japan's first professional disc recorder and used it to record the Hirohito surrender broadcast. For many decades, Denon was a brand name of Nippon-Columbia, including the Nippon Columbia record label. The Denon brand came from a merger of Denki Onkyo (not to be confused with the other Onkyo) and others in 1939. In 2001, Denon was spun off as a separate company with 98% held by Ripplewood Holdings and 2% by Hitachi. In 2002, Denon merged with Marantz to form D&M Holdings. On March 1, 2017, Sound United LLC completed the acquisition of D+M Holdings. History The company was initially named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Broadcasting
Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver (''radio''). Stations are often affiliated with a radio network which provides content in a common radio format, either in broadcast syndication or simulcast or both. Radio stations broadcast with several different types of modulation: AM radio stations transmit in AM ( amplitude modulation), FM radio stations transmit in FM (frequency modulation), which are older analog audio standards, while newer digital radio stations transmit in several digital audio standards: DAB (digital audio broadcasting), HD radio, DRM ( Digital Radio Mondiale). Television broadcasting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phonograph
A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogue recording and reproduction of sound. The sound vibration waveforms are recorded as corresponding physical deviations of a spiral groove engraved, etched, incised, or impressed into the surface of a rotating cylinder or disc, called a "record". To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and is therefore vibrated by it, very faintly reproducing the recorded sound. In early acoustic phonographs, the stylus vibrated a diaphragm which produced sound waves which were coupled to the open air through a flaring horn, or directly to the listener's ears through stethoscope-type earphones. The phonograph was invented in 1877 by Thomas Edison. Alexander Graham Bell's Volta Laboratory made s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DIY Audio
DIY Audio means " do it yourself" audio. Rather than buying a piece of possibly expensive audio equipment, such as a high-end audio amplifier or speaker, the person practicing DIY Audio will make it him/herself. Alternatively, a DIYer may take an existing manufactured item of vintage era and update or modify it. The benefits of doing so include the satisfaction of creating something enjoyable, the possibility that the equipment made or updated is of higher quality than commercially available products and the pleasure of creating a custom-made device for which no exact equivalent is marketed. Other motivations for DIY audio can include getting audio components at a lower cost, the entertainment of using the item, and being able to ensure quality of workmanship. History Audio DIY came to prominence in the 1950s to 1960s, as audio reproduction was relatively new and the technology "complex," audio reproduction equipment, and in particular high performance equipment, was not offered a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the energy of a photon, via the Planck relation ''E'' = ''hν'', where ''E'' is the photon's energy, ''ν'' is its freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lenco Turntables
Lenco is a brand of audio and video equipment, originally used by the Swiss turntable manufacturer Lenco AG from the 1940s until the 1980s. The name is now owned by Dutch concern Commaxx International NV. The Swiss company Lenco AG was founded in 1946 in Burgdorf, Switzerland by married couple Fritz and Marie Laeng. In 1925 Fritz had set up and run Radio Laeng, a shop selling and renting radios in complete and kit form. The name Lenco was derived from their surname. The firm initially produced a range of household products moulded in plastic and aluminium, before launching their first turntable in 1949 to take advantage of the, then new, LP record format introduced by Columbia Records. From the mid-1950s Lenco supplied turntables for sale in other countries, initially under the name of a local commercial partner, including Bogen in the United States and Goldring in the United Kingdom, later under its own name. In 1961 Lenco opened a factory in Osimo, Italy, where i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garrard Engineering And Manufacturing Company
The Garrard Engineering and Manufacturing Company of Swindon, Wiltshire, was a British company that was famous for producing high-quality gramophone turntables. It was formed by the jewellers Garrard & Co in 1915. The company was sold to Plessey, an electronics conglomerate, in 1960. During the period 1976-1978, Garrard developed demonstrators of the novel video disc technology. Although the team recognised the future potential of this data storage technology, Plessey chose not to invest. After several years in decline, Garrard was sold by Plessey to Gradiente Electronics of Brazil in 1979 and series production was moved to Brazil (Manaus). The remaining Garrard research and development operation in Swindon was reduced to a skeleton operation until completely shut down in 1992. Then, Gradiente licensed the Garrard name to Terence O'Sullivan, who operated as Loricraft Audio, in 1997. Between 1992 and 1997, the Garrard brand name was licensed to other companies in the US, which im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
