Use the Bose Wireless Bass Module 700 to enjoy your favorite movies and series extra intensely. This 10-inch subwoofer is especially made for the Bose soundbar 500 and 700 and the surround speakers from the smart collection. Use them together for the best sound experience. The subwoofer emphasizes the bass tones. The sound of bird of prey flying overhead or a race car driving by becomes even more realistic. You connect the subwoofer to the soundbar wirelessly, but you will need to connect the woofer to AC power.