While doing some stuff for work (tests we're required to take on cyberscholar.com regardless of whether we're in sales or not), a question caught me off guard. In these tests (regarding speakers, TVs, etc.) I didn't read the material since I already know all about that stuff. Anyways, one of the questions was this: Can a receiver function without an amplifier? The correct answer was along the lines of: "only with a special adapter." But I have a receiver (no amplifier) and I didn't require a special adapter for it to work. Can someone clarify this for me?