DESC: For over 25 years, AudioSource has provided high quality amplifiers, preamplifiers, equalizers, indoor/outdoor speakers, in-wall speakers, powered subwoofers and surround sound processors for value conscious audio enthusiasts. Powered subwoofers have become a necessary part of any complete audio/visual system, particularly for home theater. Your normal speakers can only pick up a certain range of sounds, leaving the very lowest frequencies unheard. Powered subwoofers fill in those blanks. For years, AudioSource has been offering fine powered subwoofers at excellent prices.