AVReceiver

An AV receiver, often abbreviated AVR, is a central component in many home theater systems. It combines a multichannel audio amplifier with a digital signal processor that decodes audio from source devices and distributes it to loudspeakers, while also routing video signals from sources to a display. The receiver typically serves as the hub for switching between multiple inputs and managing surround sound playback.

A key function of an AV receiver is audio decoding and processing. It supports common surround formats such as Dolby Digital and DTS, and higher-end models may decode Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X. Digital signal processing can include virtual surround, crossovers, bass management, and room correction systems (for example, Audyssey, YPAO, or MCACC) to optimize speaker performance in a given room. Some receivers also offer streaming music services, Bluetooth or Wi‑Fi connectivity, and app control.

Video capabilities are centered on HDMI inputs and outputs, with features such as 4K/60 Hz passthrough, HDR compatibility, and upscaling or signal processing. Many models support HDMI ARC or eARC to carry audio from a TV back to the receiver, reducing cable clutter. Some receivers provide video switching, upscaling, and support for newer standards like HDCP and wider color spaces.

Amplification and configuration options include built-in multichannel power amplifiers, speaker distance and level calibration, and, in many cases, pre-outs for external amplifiers or additional subwoofers. Common configurations include 5.1, 7.1, or higher channel setups.

Differences from other components: an AV receiver combines amplification, decoding, and source switching in one unit, whereas an AV preamp/processor provides decoding and processing without built-in power amplifiers. AV receivers are widely used in home theaters for integrated control of audio, video, and network features.