With the Bowers & Wilkins ASW610 you determine how heavy the bass sounds. This active subwoofer has a Bass Extension switch that lets you adjust the bass level. Choose a heavy, medium or subtle bass response. Whichever mode you choose, the bass sounds deep and clear thanks to the 250 mm driver that is capable of moving a lot of air. To prevent distortion in the sound, place the subwoofer on the included spikes.