SUPER-SIZED PASSIVE BASS RADIATOR- ENHANCE THE BASS for DEEPER RESONANCE: This portable bluetooth speaker delivers precise beats and notes. The back of the W-KING D9-1 loud Bluetooth speaker has a unique 7.2'' large passive radiator design that continuously emits powerful audio energy, ensures balanced and dynamic sound, delivering stunning sound quality. thanks to this design concept, anywhere is a suitable listening position. That's why the D9-1 speakers bluetooth wireless is a BASS-KILLER. BODY-SHAKING BASS UP & EXPLOSIVE 100W PEAK HD OUTPUT: Thanks to W-KING 60W D9-1 super large 7.2'' passive radiator: all round clear surround stereo sound, With its 2*35W PEAK Subwoofer, 2*15W PEAK tweeters and W-KING DSP technology to add depth and resonance to your favorite tracks, this large outdoor speakers will provide the strongest bass that resounds clearly in any environment. Whether you like music or movies, you can enjoy unparalleled clarity and depth at any volume