Reviewers' ChoiceWhen Naim Audio released its first wireless music system, the Mu-so ($1500 USD), in late 2014, the slab-like speaker grabbed attention with its sleek, decor-friendly looks. But the Mu-so was more than just a pretty face: packing dual three-way speakers, each driver separately powered by a 75W amp, the Mu-so was designed not only to deliver background tunes, but for serious listening. A year later, at the Consumer Electronics Show in January 2016, Naim was already demoing a new variation on the theme: the Mu-so Qb.

We live in the era of the wireless speaker. I say that not only because of the proliferation of Sonos and its clones. Nor am I talking about Bluetooth speakers, which have become the default music-playback option for most folks. What makes me think that the wireless category has finally, truly arrived are new options from companies such as Dynaudio and Devialet -- wireless, powered speakers that provide high-performance alternatives to traditional wired hi-fi systems.