Sonos Sub (3rd Gen) SpeakerBold Bass The wireless subwoofer for deep bass. Hear and feel the difference when you connect Sub to any Sonos system. Made to be seen and heard The award winning and versatile design features a slim, sculptural shape and high gloss finish. Stand Sub upright or lay it on its side Lower lows and higher highs Sub takes over the lowest frequencies, enhancing the midrange playback from paired speakers so you can experience fuller, more detailed sound.