1.CF-1830 line array is a large-scale 3-way, tri-amped system, which provides frequency ranges from 50Hz to 16KHz. 2. Dual LF 12″ neodymium woofers with double NdFeB rings, Four MF 6.5″ transducers with glass fiber cones & ultra-light voice coil and two HF 1.4″ neodymium magnet drivers with titanium diaphragm and individual high precision wave guide, 139dB SPL. 3.The system consists of 2X45 mm(voice coil)neodymium compression drivers, 4X6.5"neodymium MF driver, and 2X12″ neodymium LF drivers to achieve an impressive headroom. 4.CF-1830 is recommanded to match TSW-218 (double 18″grounding sub), S-18+, S-218+(single and double 18″ subs) powerful subwoofers.