Thanks Cowper! I guess my previous 4.1 and 5.1 surround sound setups have just had a "receiver" built into the subwoofers, as I have only seen such a receiver as that in other instances, such as at a condo, or in my father's office, or our living room. However, they have always been connected to an antenna or have had a CD player or the like as part of it, so I always assumed it was, literally, an entertainment center.  So, if I were to only want the speakers and subwoofer, without wanting what is, as I understand it, a glorified radio, what, specifically, would I look for in the description/specs? If it just says it comes with like 5 satellites (speakers) and a subwoofer, then should I assume that it will not require anything else other than a TV? I had read in the reviews of one of my potential buys that it required a separate receiver and this was when I started getting confused.

Thanks again, by the way!