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Background and Identification
An audio/video receiver (AVR or home audio receiver) is a consumer electronics component used in home theaters. Audio receivers receive audio and video signals from a variety of sources then process them and use power amplifiers to drive loudspeakers and send the video to displays such as a television or video projector. Audio receiver inputs can come from a radio, satellite receiver, DVD player, VCR, Blu-ray Disc player, or video game consoles, among other sources. Audio receiver settings and selections are typically set by a remote controller.
Early receivers performed the relatively simple task of converting a radio signal into an audio one that could be sent to an amplifier, or directly to a speaker. Modern receivers have multiple inputs and are a key component of a surround sound system.
Audio receivers are typically at least a two-channel stereo models and include built-in radio tuners. Receivers perform tasks that would otherwise require several separate devices including preamplifiers, equalizers, power amplifiers, and others. Not all audio receivers also include video switching, and this role has diminished since televisions have started supporting multiples of the same input connector type.
Stereo receivers generally include two channels of amplification that communicate with two separate amplifiers. Audio/video receivers may include more than two channels, and standard AV receivers include five channels of amplification that provides for a left, center, right, left surround sound, and right surround sound speaker.
