Harman Kardon Citation Sub is a next generation wireless subwoofer. Easy to set up and use, the Harman Kardon Citation Sub combines home audio innovation with attention to design detail for a sophisticated look and thumping bass for music and movies when paired with the Citation Bar or Citation Tower. Enjoy the full 5.1 home theater surround sound experience, but without any wires. Thanks to automatic software updates, the Citation Sub will always be up to date and in top shape..PZA MORE SPECS