Venturing into Sonos' world has historically been expensive and partly redundant: listeners have usually needed at least two pieces of equipment, and it isn't at all uncommon to see setups that cost over $1,000. The ZonePlayer S5 aims to fix this with a single-piece $399 speaker and receiver that relies on what you already have -- such as a computer or an iPod touch -- to provide its multi-room audio. Our full S5 review will let you know whether the drop in cost is a better bargain.