Enjoy enhanced audio from your favorite movies and music with this B&H Kit of the black Sonos PLAYBASE Wireless Soundbase and the black SUB Wireless Subwoofer. They pair with each other wirelessly to create a 3.1-channel, virtual-surround experience. As part of the Sonos ecosystem, you can also pair two additional Sonos speakers to use as the rears to create a 5.1-channel sound system. The subwoofer features flexible placement options, in that it can be stood upright or laid flat under a piece of furniture.