A preamplifier (preamp), or control amp in some parts of the world, is an electronic amplifier which precedes another amplifier to prepare an electronic signal for further amplification or processing. An electronic amplifier is a device for increasing the power and/or Amplitude of a signal. In Telecommunication, signalling (UK spelling or signaling (US spelling has the following meanings The use of signals for controlling communications The preamplifier circuitry may or may not be housed as a separate component.
Contents |
Description
In general, the function of a preamp is to amplify a low-level signal to line-level. Line level is a term used to denote the strength of an audio signal used to transmit analog sound information between audio components such as CD and DVD A list of common sources would include a pickup, microphone, turntable or other transducer. A pickup device acts as a Transducer that captures mechanical vibrations (usually from suitably equipped Stringed instruments such as the Electric guitar The phonograph, or gramophone, was the most common device for playing recorded Sound from the 1870s through the 1980s A transducer is a device usually electrical, electronic, Electro-mechanical, Electromagnetic, Photonic, or Photovoltaic Equalization and tone control may also be applied. Equalization (or equalisation, EQ) is the process of changing the frequency envelope of a sound in Audio processing.
In a home audio system, the term 'preamplifier' may sometimes be used to describe equipment which merely switches between different line level sources and applies a volume control, so that no actual amplification may be involved. A switch is a mechanical device used to connect and disconnect an electric Circuit at will Line level is a term used to denote the strength of an audio signal used to transmit analog sound information between audio components such as CD and DVD In Physics, attenuation (in some context also called extinction) is the gradual loss in intensity of any kind of Flux through a medium In an audio system, the second amplifier is typically a power amplifier (power amp). Generally an amplifier or simply amp, is any device that changes usually increases the amplitude of a signal. The preamplifier provides voltage gain (about: 10millivolts to 1volt) but no significant current gain. Electrical tension (or voltage after its SI unit, the Volt) is the difference of electrical potential between two points of an electrical Electric current is the flow (movement of Electric charge. The SI unit of electric current is the Ampere. The power amplifier provides the higher current necessary to drive loudspeakers. For the Marty Friedman album see Loudspeaker (album A loudspeaker, speaker, or speaker system is an electroacoustical
Preamplifiers may be:
- incorporated into the housing or chassis of the amplifier they feed
- in a separate housing
- mounted within the or near the signal source, such as a turntable, microphone or musical instrument. The phonograph, or gramophone, was the most common device for playing recorded Sound from the 1870s through the 1980s The electric bass guitar (also called electric bass, or simply bass; ˈbeɪs as in "base" is a Stringed instrument played primarily with the
Examples
- the integrated preamplifier in a foil electret microphone.
- the first stages of an instrument amplifier. An instrument amplifier is an Electronic amplifier that converts the inaudible electric or electronic signal from musical instruments such as an Electric guitar
- a stand-alone unit for use in live music and recording studio applications. A concert is a live Performance, usually of Music, before an Audience. A recording studio is a facility for sound recording. Ideally the space is specially designed by an acoustician to achieve the desired acoustic properties (sound
- as part of a stand-alone channel strip or channel strip built into an audio mixing desk. An audio channel strip may be a stand alone unit or one of many units built into a Mixing desk. In professional audio, a mixing console, or audio mixer, also called a sound board or soundboard, is an electronic device for combining
- a masthead amplifier used with television receiver antenna or a satellite receiver dish. Television ( TV) is a widely used Telecommunication medium for sending ( Broadcasting) and receiving moving Images, either monochromatic An antenna is a Transducer designed to transmit or Receive electromagnetic waves In other words antennas convert electromagnetic waves into This article is about artificial satellites For natural satellites also known as moons see Natural satellite.
- The circuit inside of a hard drive connected to the magnetic heads or the circuit inside of CD/DVD drive which connects to the photodiodes.
See also
External Links
A buffer amplifier (sometimes simply called a buffer) is one that provides Electrical impedance transformation from one circuit to anotherDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic