This is a Geek Squad Certified Open Box Product. See below for more information. Bring extra power to movies, music, and other content with the Polk Monitor MXT10 home theatre subwoofer. This 100W unit uses 10" drivers to deliver dynamic bass down to 24Hz, adding realism to every crunch, explosion, and roar. It offers Dolby Atmos, DTS:X, and Auro 3D support for better immersion and has a non-resonant cabinet for clearer sound.