The TrueLine X118S is designed to satisfy the need for an extreme high-SPL sub bass loudspeaker system. Components have been selected solely for their performance. The TrueLine X118S utilizes a direct radiating 18-inch, 700W cone driver in a tuned enclosure, which provides maximum output with minimal distortion and smooth extended low frequency response. The tour-tested 15 ply Baltic birch highly braced enclosure and 18 mm thick baffle board construction provide unsurpassed rigidity and strength.