The Sony HT-A3000 is a 3.1-channel Dolby Atmos and DTS:X sound bar with a dedicated centre channel and a built-in dual subwoofer, using Vertical Surround Engine for a sense of height. This unit is Open Box. Built-in dual subwoofer adds bass within the unit, with voice control supported Expandable with an optional Sony subwoofer and rear speakers, sold separately This description was generated by AI and reviewed for accuracy.