5V Amplifier Kit
An 5V Amplifier Kit (or power amp) is an electronic amplifier that amplifies low-power electronic audio signals such as the signal from radio receiver or electric guitar pickup to a level that is high enough for driving loudspeakers or headphones.
5V Amplifier Kit are found in all manner of sound systems including sound reinforcement, public address and home audio systems and musical instrument amplifiers like guitar amplifiers. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers.
The preceding stages of 5V Amplifier Kit in such a chain are low power audio amplifiers which perform tasks like pre-amplification of the signal (this is particularly associated with record turntable signals, microphone signals and electric instrument signals from pickups,such as the electric guitar and electric bass), equalization (e.g., adjusting the bass and treble), tone controls, mixing different input signals or adding electronic effects such as reverb.
The inputs of 5V Amplifier Kit can also be any number of audio sources like record players, CD players, digital audio players and cassette players. Most 5V Amplifier Kit Without Volumes require these low-level inputs, which are line level.
While the input signal to an 5V Amplifier Kit, such as the signal from an electric guitar, may measure only a few hundred microwatts, its output may be a few watts for small consumer electronics devices, such as clock radios, tens or hundreds of watts for a home stereo system, several thousand watts for a nightclub’s sound system or tens of thousands of watts for a large rock concert sound reinforcement system.
While 5V Amplifier Kits are available in standalone units, typically aimed at the hi-fi audiophile market (a niche market) of audio enthusiasts and sound reinforcement system professionals, most consumer electronics sound products, such as clock radios, boom boxes and televisions have relatively small power amplifiers that are integrated inside the chassis of the main product.
Key design parameters for 5V Amplifier Kits are frequency response, gain, noise, and distortion. These are interdependent; increasing gain often leads to undesirable increases in noise and distortion. While negative feedback actually reduces the gain, it also reduces distortion. Most 5V Amplifier Kits are linear amplifiers operating in class AB.
Until the 1970s, most amplifiers were tube amplifiers which used vacuum tubes. During the 1970s, tube amps were increasingly replaced with transistor-based amplifiers, which were lighter in weight, more reliable, and lower maintenance.
Nevertheless, there are still niche markets of consumers who continue to use tube amplifiers and tube preamplifiers in the 2010s, such as with home hi-fi enthusiasts, audio engineers and music producers (who use tube preamplifiers in studio recordings to “warm up” microphone signals) and electric guitarists, electric bassists and Hammond organ players, of whom a minority continue to use tube preamps, tube power amps and tube effects units.
While hi-fi enthusiasts and audio engineers doing live sound or monitoring tracks in the studio typically seek out amplifiers with the lowest distortion, electric instrument players in genres such as blues, rock music and heavy metal music, among others, use tube amplifiers because they like the natural overdrive that tube amps produce when pushed hard.
In the 2000s, the Class-D amplifier, which is much more efficient than Class AB amplifiers, is widely used in consumer electronics audio products, bass amplifiers and sound reinforcement system gear, as Class D amplifiers are much lighter in weight and produce much less heat.
Important applications include public address systems, theatrical and concert sound reinforcement systems, and domestic systems such as a stereo or home-theatre system. Instrument amplifiers including guitar amplifiers and electric keyboard amplifiers also use audio power amplifiers.
In some cases, the power amplifier for an instrument amplifier is integrated into a single amplifier “head” which contains a preamplifier, tone controls, and electronic effects. These components may be mounted in a wooden speaker cabinet to create a “combo amplifier”.
Musicians with unique performance needs and/or a need for very powerful amplification may create a custom setup with separate rackmount preamplifiers, equalizers, and a power amplifier mounted in a 19″ road case.
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