Sonos is the biggie in wireless sound streaming, owning 85 percent of the market. Sonos, which just passed its first decade, was out early with smart, integrated receiver-speakers, also early to make deals with subscription services, and then to shift control of smart speakers from remotes to a free touchscreen app on smartphones and tablets.
A new upgrade, Trueplay, lets you fine-tune the performance of most Sonos speakers. Trueplay uses the mike on a smartphone or tablet to measure sound in your room and then EQs - equalizer adjusts - its output.
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