Av Receiver in Home Theater System is a main role player. All control in home theater system handled by AV Receiver. AV receiver amplify all kind of input like CD, VCD, DVD or Laserdisc Player, audio input from TV and Radio Tuner. The one and important is AV receiver able to process audio digital signal by Digital Signal Processor (DSP) to produce various effects like stadium, stage, living room, large theater, etc.

The primary purpose is to amplify sound from a multitude of possible audio sources as well as route video signals to your TV from various sources.

The term receiver originally referred to a component which included a tuner, a pre-amplifier and a power amplifier. These were generally called stereo receivers. The built in tuner in these devices gave them the name receivers.

As home entertainment options expanded, so did the role of the receiver. The ability to handle a variety of digital audio signals was added. More amplifiers with added for surround sound playback. Video switching was added, to simplify switching. Within the last few years, video processing has been added to many receivers.

The term Audio Video Receiver (abbreviated AVR) or Home Theater Receiver is used to distinguish the simpler stereo receiver from the multi-channel audio video receiver.