Specifications: system type: 18′′ bass-reflex subwoofer frequency range (-10 db): 35 hz – 250 hz frequency response (±3 db): 40 hz – 120 hz input connection modes: switchable, +1/-1 or +2/-2 recommended crossover frequencies: 30 hz, 24 db / octave hpf 80 hz, 24 db / octave lpf power rating (continuous1 / program / peak): 1000 w / 2000 w / 4000 w maximum spl2 : 132 db spl peak sensitivity (1w @ 1m): 96 db spl lf driver: 1 x jbl 2242h 457 mm (18 in) super vented gap cooledtm woofer nominal impedance: 8 ohms active tunings: designed groundaudio 3602 amplifier. settings mounting: top mounted m20 threaded socket for optional ss4- bk pole enclosure: rectangular, 18 mm, 13-ply birch/poplar laminate plywood transport: 4 side handles, bottom mounting points for optional casters finish: black