This powered Velodyne subwoofer combines deep, rich lows with a pristine, glossy finish. Gently used by my audiophile grandfather since he purchased it around 2006. Excellent upgrade to your home audio, home theater, or recording setup. Basically, if you have great monitors or bookshelf speakers yet desire more bass, you've come to the right place. There are controls on the back to quickly fine-tune the feel, too.