The 7-year-old music streaming service Deezer has amassed 16 million users, including 5 million paying subscribers, from 180 countries. Though it's the second-biggest such subscription service in the world, U.S. music listeners have never had access.
That's about to change, but the long-anticipated U.S. launch of one of Spotify's biggest rivals comes with a big asterisk.
On Wednesday, the Paris-based company said it has teamed with the wireless speaker firm Sonos for a version of Deezer that streams so-called hi-resolution audio, hoping to introduce better sounding tracks to the music streaming world.
While companies such as Spotify and Apple's Beats Music have tried...