JBL Creature II Powered 3-Piece Multimedia Speaker System (Black) 3-piece multimedia speaker system with 2 powered satellite speakers and subwoofer Ideal for connecting to computers, boomboxes, digital music players, and portable audio devices Includes Odyssey Plus satellite drivers and 4-inch Magnum subwoofer transducer 50 Hz to 20 kHz frequency response; built-in volume controls and treble and bass knobs 40 watts total RMS power (8 watts x 2, plus 24-watt subwoofer)