... "X2 subwoofer,woofer,usb speaeker, Multimedia speaker ,Computer Speaker,Mini speaker,MP3/MP4 Speaker, Portable Speaker , Home theatre speaker,Hifi speaker,Speaker Box, Speaker Cable, Speaker Stand, Loudspeaker, Sound box. High ... Sub-woofer Driver. 4" Sub-woofer Drive UnitBig Speaker, Big Base. This Speaker system has 4 Inch Sub-woofer. Wooden MadeWooden Made ...