Small in size, mighty in bass. The wireless Addon C-SUB multi-room subwoofer is distinctively small, but delivers a massive punch you really can feel. It's a perfect 23cm cube of heart-pounding, definitive bass enjoyment. Wireless auto connect to the nearest Audio Pro multi-room speaker, or play old school with cable. Easy to place, easy to love. More bass to your music, with less wire clutter.