When most of us were kids, a home entertainment system was a record player and the wiring was a two-prong plug. Today it’s a lot more complicated. But A-BUS Direct multiroom audio speakers from Eaton Corp. simplify the installation process because they require only a single cat-5 cable to connect with the audio/video source. The speakers include integral amplification and can be operated by a remote-control device (which is included). They’re sold in exterior as well as interior versions; the cost to contractors is about $220 per pair. Eaton Corp., 800/386-1911, eaton.com.