The G18-SUB is an 18" compact subwoofer that provides powerful and extended low frequency response. Low port compression and optimized enclosure design give a tight, accurate bass response that is ideally suited as a sub-extension for the G700-Series systems. The G18-SUB is equipped with an extremely long excursion 18" neodymium ultra low distortion woofer. The neodymium motor delivers extreme high magnetic flux for increased efficiency. The 4" voice coil is 38 mm high, ensuring ultra linear excursion of 26mm/pp at consistent magnetic force. State-of-the-art carbon-fiber cone ensures maximum stiffness and low moving mass. Three aluminum shorting rings reduce inter modulation distortion minimize induction variation while reducing thermal compression. This design dramatically reduces the distortion of a typical sub-woofer at longer excursion levels, and improves the overall sound quality and performance characteristics of the cabinet. The G18-SUB is used in houses of worship, theaters, clubs and mobile applications.