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DI Box
A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input, usually via an XLR connector and XLR cable. DIs are frequently used to connect an electric guitar or electric bass to a mixing console's microphone input jack. Its signal comes "direct" from the source instrument without passing through the air as sound waves, and thus is isolated from other sounds and avoids effects of microphone or room acoustics. The DI performs level matching, balancing, and either active buffering or passive impedance matching or impedance bridging. DI units are typically metal boxes with input and output jacks and, for more expensive units, “ground lift” and attenuator switches. DI boxes are extensively used with professional and semi-professional PA systems, professional sound reinforcement systems and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DI Box 8121
Di or DI may refer to: Arts and media Music * Di, a tone in the solfège ascending chromatic scale existing between Do and Re * dizi (instrument) or di, a Chinese transverse flute * D.I. (band), ''D.I.'' (band), a punk band from Southern California ** D.I. (EP), ''D.I.'' (EP), a 1983 EP by the same band above Other media * ''The D.I.'', 1957 military film by Jack Webb * ''Dagens Industri'', a Swedish financial newspaper * DI.FM, an internet radio service Businesses and organisations * Defence Intelligence, a UK military intelligence agency * Defensa Interior, an anti-Franco militant anarchist group in 1960s Spain * Deseret Industries, an LDS thrift store * Desert Inn, a former casino in Las Vegas * Direction Italy, a liberal-conservative political party in Italy * Dirgantara Indonesia, an Indonesian aircraft company * Discovery Institute, an intelligent design advocacy group * Marabu (airline) (IATA code: DI), an Estonian leisure airline * Norwegian Air UK (former IATA code: DI) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attenuator (electronics)
An attenuator is a Passivity (engineering), passive wideband, broadband Electronics, electronic device that reduces the Electric power, power of a signal without appreciably distortion, distorting its waveform. An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain (electronics), gain, an attenuator provides loss, or gain less than unity. An attenuator is often referred to as a "pad" in audio electronics. Construction and usage Attenuators are usually Passivity (engineering), passive devices made from simple voltage divider networks. Switching between different resistances forms adjustable stepped attenuators and continuously adjustable ones using potentiometers. For higher frequencies precisely matched low Standing wave ratio, voltage standing wave ratio (VSWR) Electrical resistance, resistance networks are used. Fixed attenuators in circuits are used to lower voltage, Dissipation, dissipate power, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Impedance
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of Electrical_resistance, resistance and Electrical_reactance, reactance in a electrical circuit, circuit. Quantitatively, the impedance of a two-terminal Electrical element, circuit element is the ratio of the phasor, complex representation of the Sine wave, sinusoidal voltage between its terminals, to the complex representation of the current flowing through it. In general, it depends upon the frequency of the sinusoidal voltage. Impedance extends the concept of Electrical resistance, resistance to alternating current (AC) circuits, and possesses both Euclidean vector, magnitude and Phase (waves), phase, unlike resistance, which has only magnitude. Impedance can be represented as a complex number, with the same units as resistance, for which the SI unit is the ohm (). Its symbol is usually , and it may be represented by writing its magnitude and phase in the Polar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microphone Preamp
The term microphone preamplifier can either refer to the electronic circuitry within a microphone, or to a separate device or circuit that the microphone is connected to. In either instance, the purpose of the microphone preamplifier is the same. A microphone preamplifier is a sound engineering device that prepares a microphone signal to be processed by other equipment. Microphone signals are often too weak to be transmitted to units such as mixing consoles and recording devices with adequate quality. Preamplifiers increase a microphone signal to line level (i.e. the level of signal strength required by such devices) by providing stable gain while preventing induced noise that would otherwise distort the signal.Ballou, 1987, pp. 506–507. For additional discussion of signal level, see Gain stage. A microphone preamplifier is colloquially called a microphone preamp, mic preamp, micamp, ''preamp'' (not to be confused with a control amplifier in high-fidelity reproduction equipme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Input Impedance
In electrical engineering, the input impedance of an electrical network is the measure of the opposition to current ( impedance), both static ( resistance) and dynamic ( reactance), into a load network or circuit that is ''external'' to the electrical source network. The input admittance (the reciprocal of impedance) is a measure of the load network's propensity to draw current. The source network is the portion of the network that transmits power, and the load network is the portion of the network that consumes power. For an electrical property measurement instrument like an oscilloscope, the instrument is a load circuit to an electrical circuit (source circuit) to be measured, so the input impedance is the impedance of the instrument seen by the circuit to be measured. Input impedance If the load network were replaced by a device with an output impedance equal to the input impedance of the load network (equivalent circuit), the characteristics of the source-load network w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pickup (music Technology)
A pickup is an electronic device that converts energy from one form to another that captures or senses mechanical vibrations produced by musical instruments, particularly stringed instruments such as the electric guitar, and converts these to an electrical signal that is amplified using an instrument amplifier to produce musical sounds through a loudspeaker in a speaker enclosure. The signal from a pickup can also be recorded directly. The first electrical string instrument with pickups, the " Frying Pan" slide guitar, was created by George Beauchamp and Adolph Rickenbacker around 1931. Most electric guitars and electric basses use magnetic pickups. Acoustic guitars, upright basses and fiddles often use a piezo electric pickup. Magnetic pickups A typical magnetic pickup is a transducer (specifically a variable reluctance sensor) that consists of one or more permanent magnets (usually alnico or ferrite) wrapped with a coil of several thousand turns of fine enameled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audio Transformer
Various types of electrical transformer are made for different purposes. Despite their design differences, the various types employ the same basic principle as discovered in 1831 by Michael Faraday, and share several key functional parts. Power transformer Laminated core This is the most common type of transformer, widely used in electric power transmission and appliances to convert mains voltage to low voltage to power electronic devices. They are available in power ratings ranging from mW to MW. The insulated laminations minimize eddy current losses in the iron core. Small appliance and electronic transformers may use a split bobbin, giving a high level of insulation between the windings. The rectangular cores are made up of stampings, often in E-I shape pairs, but other shapes are sometimes used. Shields between primary and secondary may be fitted to reduce EMI (electromagnetic interference), or a screen winding is occasionally used. Small appliance and electronics t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden World Records
Golden World Records was an American record label owned by Eddie Wingate and Joanne Bratton (née Jackson, former wife of boxing champion Johnny Bratton). The recording studio was located in Detroit, Michigan, United States. The studio's national hits included " Oh How Happy" by Shades of Blue and " (Just Like) Romeo and Juliet" by The Reflections. The early, pre-Motown songs of Edwin Starr, such as "Agent Double-O-Soul", were recorded at the Golden World studio. Golden World Records operated from 1962 to 1968. The label and its subsidiaries were purchased by Berry Gordy in 1966 and folded into the Motown Record Corporation. The Golden World studio became Motown's "Studio B", working in support of the original Motown recording studio (Studio A) at Hitsville USA. Before its purchase by Gordy, the studio's recordings often included moonlighting Motown back-up musicians, including James Jamerson on bass and George McGregor on percussion. The famous clock that hung in Golden Wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Sound Systems
United Sound Systems is a recording studio and locally designated historic district in Detroit, Michigan, United States. Many popular music artists over the last seventy years have recorded at the facility, including blues musicians like John Lee Hooker (he recorded "Boogie Chillen'" there in 1948), and funk bands like Parliament-Funkadelic. The studio was also the site of the first recording for Berry Gordy's Tamla label in 1959, starting what would become Motown Records. The building is threatened by a planned highway service drive expansion by the Michigan Department of Transportation. The studio ownership changed in 2009 and eventually reopened in 2014. It was designated a local historic district by the City of Detroit in 2015. Others who have recorded at the studio include Aretha Franklin, Johnnie Ray, Dizzy Gillespie, Bob Seger, Jackie Wilson, Dan Schafer and Alberta Adams. History There is currently a debate within collector forums and Detroit music historians about the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motown
Motown is an American record label owned by the Universal Music Group. Founded by Berry Gordy, Berry Gordy Jr. as Tamla Records on January 12, 1959, it was incorporated as Motown Record Corporation on April 14, 1960. Its name, a portmanteau of ''motor'' and ''town'', has become a nickname for Detroit, where the label was originally headquartered. Motown played a vital role in the racial integration of popular music as an African American-owned label that achieved crossover (music), crossover success with white audiences. In the 1960s, Motown and its main subsidiary labels (including Gordy, Soul) were the most prominent exponents of what became known as the #Motown sound, Motown sound, a style of soul music with a mainstream pop music, pop-influenced sound and appeal. Motown was the most successful soul music label, with a net worth of $61 million in 1988. Between 1960 and 1969, Motown had 79 songs reach the top-ten of the Billboard Hot 100, ''Billboard'' Hot 100. In March 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passivity (engineering)
Passivity is a property of engineering systems, most commonly encountered in analog electronics and control systems. Typically, analog designers use ''passivity'' to refer to incrementally passive components and systems, which are incapable of Gain (electronics), power gain. In contrast, control systems engineers will use ''passivity'' to refer to thermodynamically passive ones, which consume, but do not produce, energy. As such, without context or a qualifier, the term ''passive'' is ambiguous. An electronic circuit consisting entirely of passive components is called a passive circuit, and has the same properties as a passive component. If a device is ''not'' passive, then it is an active device. Thermodynamic passivity In control systems and circuit network theory, a passive component or circuit is one that consumes energy, but does not produce energy. Under this methodology, voltage source, voltage and current sources are considered active, while resistors, capacitors, ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
