JBL SRX728 Dual 18-Inch Double Subwoofer

Jbl srx728s specifications: frequency range (-10 db): 27hz—220hz frequency response (±3 db): 33hz—220hz input connection modes: switchable, +1/-1 or +2/-2; internally selectable, parallel or discrete recommended crossover frequencies: 80hz, 24db/octave hpf; 80hz, 24db/octave lpf power rating (continuous/program/peak): parallel: 1600w/3200w/6400w maximum spl: 136db spl peak sensitivity (1w @ 1m): 98db spl lf driver: 2 x jbl 2268h 18′′ differential drive woofer with neodymium-magnet and dual voice-coils nominal impedance: 4 ohms parallel; 8 ohms x 2 active discrete enclosure: rectangular, 18mm, 13-ply birch plywood finish: black duraflex finish grille: powder coated, black, 16-gauge perforated steel with acoustical transparent charcoal foam backing. dimensions: 42′′w x 23-3/4′′h x 33′′d net weight: 166-1/2 lbs.