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Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus One hi-fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.
Behringer is an audio equipment company founded by the Swiss engineer Uli Behringer on 25 January 1989 in Willich, Germany. Behringer produces equipment including synthesizers, mixers, audio interfaces and amplifiers. Behringer is owned by Music Tribe (formerly Music Group), a holding company chaired by Uli Behringer. [1]
If a player uses a separate preamplifier and power amplifier, she or he can buy a power amplifier intended for a sound reinforcement system or PA system or pick a power amplifier designed specifically for bass instruments. These preamps and power amps come in two formats: 19 inch rack-mountable units and units with their own wood or metal case.
In very high power transmitters, such as 10 kilowatts and above, multiple IPAs are combined to provide enough drive for the final. An exciter, an even lower power transmitter, provides a similar service to the IPA by driving it; although an exciter usually encompasses other important functions, such as choosing the frequency of the RF.
8 W audio power amplifier: LM384 5 W audio power amplifier (fixed 34 dB gain) [44] LM1875 20 W audio power amplifier (up to 90 dB gain) [45] LM1876 Dual 20 W audio power amplifier with Mute and Standby Modes (up to 90 dB gain) [46] LM386: Low voltage audio power amplifier [47] LM389 Yes Low voltage audio power amplifier (same as LM386) with 3 ...
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Some two channel amplifiers, or stereo amplifiers, have the built in facility to operate in bridge mode by operating a switch and observing the input and output connections detailed on the back panel or in the manual. This option is most often found in high power PA equipment or amplifiers designed for car audio applications.
Figure 2: A negative-feedback amplifier. The circuit can be explained by viewing the transistor as being under the control of negative feedback.From this viewpoint, a common-collector stage (Fig. 1) is an amplifier with full series negative feedback.