I've decided that my next equipment purchase will be a 2-channel amp probably between 150W - 200W per channel. I'm probably going to buy used as well. I currently have a Sony Reciever DE-545, will the amp work with this? How do they connect? What is the difference between a pre-amp and an amp...based on the name I would guess that a pre-amp would hook in between my components and my reciever amplifying the signal before it gets to my reciever. The amp would hook in between my reciever and speakers amplifying the signal from the reciever to the speakers. Am I close? Sorry for the flurry of questions.