It has arrived well after its competitors, but the McIntosh McAire desktop wireless music system (www.mcintoshlabs.com) outperforms them all. Priced at $3,000, it is easy to use and syncs with any Apple AirPlay–enabled device or home-network music library. It also offers a wired connection via USB or RCA inputs. Each of the system’s two channels features a 4-inch ported woofer, a 2-inch midrange driver, and a dome tweeter. All of those are powered by internal digital amplification that fills even large rooms with a big soundstage, solid bass, and crystalline musical details.