As a newbie to HT, I lack lots of information about the terminology and equipment. So far I have been using an integrated AV Reciever, currently have the Denon 2802. But, I am reading a lot about people going for separates instead of integrated and using Power Amps, Pre Amps, Processors, and god knows what else. Are there any documents or places where I can get some information on what a Pre Amp is and what a Power Amp is and why do we need both ? I would appreciate any help.