Active vented subwoofer enclosure with stereo crossover and C-Audio Core Processing 18'' neodymium woofer - 4" VC, 1500 W, Max SPL: 133 dB @ 1m, Control: SUB level, stereo\mono, flat, gnd lift, x-over freq. selection 100\160 Hz, phase, 15 and 18 mm plywood, black. 1 x tophat. Flying System: 5 x M10 - top, bottom& rear, 38kg