Sub Mini Subwoofer Adds Low-Frequency Power to Sonos Speaker Systems Roku isn't the only company with a new small subwoofer for its speakers. Sonos just announced its own, the Sub Mini.Get more news about fashion subwoofer speaker,you can vist our website! The Sonos Sub Mini is a scaled-down version of the Sonos Sub, the company's already established add-on subwoofer for its sound systems. At...