No quality home theater or music system is complete without the ability to effortlessly reproduce the last one and-a-half octaves of sound--the deep bass. The 224 SB is a powered subwoofer provides the deep bass that adds drama to the action scenes in a movie and makes music come alive. Clean, powerful deep bass is what separates a great sound system from a merely good one. include powerful low-distortion amplifiers and low-resonance, long-throw drivers, housed in a heavily-braced, non-resonant sealed box enclosure. This -Inchacoustic suspension-Inch approach because it ensures smooth, uniform bass all the way down to the lowest audible frequencies with no unwanted peaks or dips. Exclusive Clear Filter Technology assures clean, articulate, musical bass reproduction at all times, regardless of how loud you play the Atlantic Technology sub.