The HT-A5000 envelops you in authentic 5.1.2 channel surround sound with up-firing speakers, side beam tweeters, and a built-in dual subwoofer. And with optional rear speakers it supports 360 Spatial Sound Mapping, taking movies, TV and music into a whole new realm. Discover wide 360 Spatial Sound with optional rear speakers – The listening area is not limited to the front of the TV but encompasses a much wider space. An optional wireless subwoofer allows a built-in dual subwoofer in the soundbar to handle bass and vocals with the optional wireless subwoofer focusing on low range sound.