In addition to the ZP120, Sonos has refreshed its ZP80, a zone player without a built-in amplifier that you can plug into your existing stereo system. The $349 ZP90 is the same size as the original, but also boasts improved wireless range, according to Sonos.

If you already own a Sonos system, the new Zone Players offer no compelling reason to upgrade, unless you have significant range problems. But for new buyers, the updated hardware should make the system even more reliable, especially in large homes.