The audio/video or a/v receiver and amplifier assembly in your home theater system is pretty much the same thing as the receiver and amplifier in any basic stereo system. Its just is to receive signals from several types of input devices like your dvd player or satellite dish. Next, it will interpret and amplify each signal before sending each of them to output devices like your TV or surround sound speakers.
The audio/video receiver and amplifier assembly bring together different pieces of your home theater so they work together. A few will have a DVD player or other device built in to save space in your home theater. The most cost effective way to build a home theater is to buy one of these units that does all the work, though there are those that would argue that buying the components separately does a far superior job in creating a high end home theater system.
Receivers contain several components, each with an important task. These components are a/v inputs for your video equipment including dvd players, blu-ray players, and your dvr or Tivo, a preamplifier, a signal processor to decode signals going to your surround sound speakers, power amps for each sound channel, and finally outputs for sound and video (your speakers and your television).
The path all this travels is pretty simple, even in the confusion of cords and boxes. Your source component is where the signal comes from. This is your DVD player or DVR usually. It feeds a signal into your reciever unit. After that, you choose which input component you want to feed the output to. Then the preamplifier picks up this signal and amplifies it just a bit.
The receiver, known to many as the heart of the home theater, will send the video to your tv and the audio to the decoder. After that, it is just a matter of the decoder sorting out sound channels from the video signal and getting that information to amplifiers for their individual sound output. Sounds complicated? For you, it is just a matter of plugging up your speakers right.
There are as many audio/video receivers available as there are types of home theater systems. These receivers are usually sold as a kit containing all your speakers, meaning you have the makings of a complete home theater kit. These systems will run anywhere from 250 dollars to 2,500 dollars. Finding which one is right for you is as simple as assessing your needs and bringing those needs to your local electronics professional.
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