I recall seeing a thread detailing what exact a receiver do. But I am still a bit confused. Can anyone answer these questions? Does a receiver come with an Amplifer. I hear the term Pre-Amp is used a lot with a receiver but not an Amplifier? The Processor component of the receiver decodes digital information from the audio/dvd disc. What are the different formats out besides Dolby and DTS? Do receivers normally come with a FM/AM tuner? There are higher end models out there with 6.1 and 7.1 outputs, does this mean it can support 6 or 7 speakers? Are these standards supported on normal Audio CDs or DVDs? And finally, what are some of the features you look for when considering purchasing a good receiver?