The Sonos Arc Ultra is a 9.1.4-channel Dolby Atmos smart sound bar with 14 built-in drivers for immersive surround sound with overhead effects, in a Black finish. Brand New. Built-in Alexa and Speech Enhancement add voice control and clearer dialogue AirPlay 2 and Wi-Fi multi-room; expandable with a Sonos Sub and Era 300 rears, sold separately This description was generated by AI and reviewed for accuracy.