Amplifier (Fr. amplificateur; Ger. Verstärker; It. amplificatore)
- Hugh Davies
An electrical circuit which increases the strength of its input, and normally acts as an interface between an otherwise incompatible input and output. Certain hi-fi systems and large-scale amplification installations feature separate power amplifiers, which drive one or more loudspeakers, and preamplifiers, which boost and match the different electrical characteristics of a variety of inputs; preamplifiers are otherwise incorporated into other devices, such as mixing consoles and stereophonic hi-fi amplifiers. At its simplest the amplification chain can be seen as microphone (or other source)–amplifier–loudspeaker. The rock music ‘amp’ (combination unit or ‘combo’) consists of a portable loudspeaker cabinet containing an appropriate power amplifier and preamplifier. ...