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DI Unit
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, line level, 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. The DI performs level matching, balancing, and either active buffering or passive impedance matching/impedance bridging to minimize unwanted noise, distortion, and ground loops. 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 in sound recording studios. Manufacturers produce a wide range of units, from inexpensive, basic, passive units to expensive, s ... [...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), a punk band from Southern California ** ''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 * Norwegian Air UK, a UK based airline (IATA designator) * DynCorp International, a major United States defense contracto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bass Amplifier
A bass amplifier (also abbreviated to bass amp) is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the bass guitar or double bass loud enough to be heard by the performers and audience. Bass amps typically consist of a preamplifier, tone controls, a power amplifier and one or more loudspeakers ("drivers") in a cabinet. While bass amps share many features with the guitar amplifiers used for electric guitar, they are distinct from other types of amplification systems, due to the particular challenges associated with low-frequency sound reproduction. This distinction affects the design of the loudspeakers, the size and design of the speaker cabinet and the design of the preamplifier and amplifier. Speaker cabinets for bass amps usually incorporate larger loudspeakers (e.g., speakers are more common for bass than for electric guitar amps) or more speakers and larger cabinet sizes than those used for the amplification ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fender Precision Bass
The Fender Precision Bass (often shortened to "P-Bass") is a model of electric bass guitar manufactured by Fender Musical Instruments Corporation. In its standard, post-1957 configuration, the Precision Bass is a solid body, four-stringed instrument usually equipped with a single split-coil humbucking pickup and a one-piece, 20-fret maple neck with rosewood or maple fingerboard. Its prototype, designed by Leo Fender in 1950, was brought to market in 1951. It was the first electric bass guitar to earn widespread attention and use, remaining among the best-selling and most-imitated electric bass guitars with considerable effect on the sound of popular music. Background The double bass is among the largest and most physically cumbersome instruments which are regularly still transported by the player themselves on their own. It is also hard to hear in large bands or those that use amplified instruments, and it requires specialized skills to play that are distinct from those requir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodes Piano
The Rhodes piano (also known as the Fender Rhodes piano) is an electric piano invented by Harold Rhodes, which became popular in the 1970s. Like a conventional piano, the Rhodes generates sound with keys and hammers, but instead of strings, the hammers strike thin metal tines, which vibrate next to an electromagnetic pickup. The signal is then sent through a cable to an external keyboard amplifier and speaker. The instrument evolved from Rhodes's attempt to manufacture pianos while teaching recovering soldiers during World War II. Development continued after the war and into the following decade. In 1959, Fender began marketing the Piano Bass, a cut-down version; the full-size instrument did not appear until after Fender's sale to CBS in 1965. CBS oversaw mass production of the Rhodes piano in the 1970s, and it was used extensively through the decade, particularly in jazz, pop, and soul music. It was less used in the 1980s because of competition with polyphonic and digita ... [...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 resistance and reactance in a circuit. Quantitatively, the impedance of a two-terminal circuit element is the ratio of the complex representation of the 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 resistance to alternating current (AC) circuits, and possesses both magnitude and 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 form . However, Cartesian complex number representation is often more powerful for circuit analysis purposes. The notion of impedance is useful for perf ... [...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 equipment), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Input Impedance
The input impedance of an electrical network is the measure of the opposition to current ( impedance), both static ( resistance) and dynamic ( reactance), into the load network that is ''external'' to the electrical source. The input admittance (the reciprocal of impedance) is a measure of the load'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. 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 would be the same from the perspective of the connection point. So, the voltage across and the current through the input terminals would be identical to the chosen load network. Therefore, the input impedance of the load and the output impedance of the source determine how the source current and voltage change. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pickup (music Technology)
A pickup is a transducer 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. Most electric guitars and electric basses use magnetic pickups. Acoustic guitars, upright basses and fiddles often use a piezoelectric 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 copper wire. The magnet creates a magnetic field which is focused by the pickup's pole piece or pieces. The permanent magnet in the pickup magnetizes the guitar string above it. This causes the string to generate a ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audio Transformer
A variety of 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 minimizes 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 electro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfbox
The Wolfbox is the name for the original passive DI unit, direct box, or DI as invented in the late 1950s by Dr. Edward Wolfrum, PhD, alumnus engineer of Motown, Golden World Records, Terra-Shirma Studios, Metro-Audio Capstan Roller Remote recording, and United Sound Systems in Detroit, Michigan. Used by James Jamerson, Dennis Coffey, Bob Babbit and other The Funk Brothers, the Wolfbox was a key component in the 1960s and 1970s sound of recorded music in the Motown/Detroit scene. Origin According to Wolfrum, the idea for the creation of the device originally came to him out of necessity, from "…Recording bands back then arly 1960sand the fact that I simply couldn't afford microphones." It was at Detroit's WEXL in 1962 that 16-year-old staff engineer Wolfrum incorporated his newly created passive direct interface box – later known at the "Wolfbox" – as an interface from the high-impedance output of church PA systems to the microphone input of broadcast audio mixers. Recen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden World Records
Golden World Records was a 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 by Edwin Starr, such as "Agent Double-O-Soul", were recorded in 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 World Records ... [...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 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 Johnnie Ray, Dizzy Gillespie, Jackie Wilson, Dan Schafer and Alberta Adams. History There is currently a debate within collector forums and Detroit music historians about the origins of United. The issues revolve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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