With the Bowers & Wilkins ASW610XP you bring every song or movie soundtrack to life. This active subwoofer is equipped with a 500 watt amplifier and a 250 mm driver. This allows you to listen to a powerful bass response. If you want to adjust the bass level, use the Bass Extension switch. Choose from 3 modes and determine whether you are listening to a subtle or firm bass. To prevent distortion in the sound, place the subwoofer on the included spikes.