In a traditional setup, that power comes from speaker wire, and that’s of course not a factor in this article. That’s Portion of The rationale we like the Sonos system described above: the front speakers are contained inside a single sound bar, which not surprisingly only needs a single plug. https://www.bluetoothspeaker.top/hot-selling-wireless-speaker-bt5-0-outdoor-subwoofer-hight-powerful-sound/