The 118S subwoofer features a single 18-inch transducer with a cast aluminum frame that is designed for added strength and reliability. This exceptional subwoofer employs a 3-inch voice coil for sustained high power handling capability—the largest in its class! With a frequency response of 38Hz to 500Hz, the 118S is rated at 1000 watts and can provide ample low-end fullness for a wide variety of SR applications.