FEATURES: Dual 18 in, 2268H Differential Drive® woofers for extended low frequency output. Large vent area for reduced distortion. The JBL SRX728S Dual 18″ Passive Subwoofer is a high power subwoofer system containing two 2268H neodymium magnet, patented* Differential Drive®, 18″ woofers in a front-loaded, vented enclosure. The enclosure is designed to present a minimum frontal area. The system offers complete input connection flexibility for compatibility with a variety of cabling schemes. A recessed, external switch allows selection of either contacts 1/-1 or 2/-2. By relocating an internal connector, it is also possible to drive each woofer discretely from a separate amplifier channel. The enclosure is constructed of top quality birch plywood and coated in JBL’s rugged DuraFlex™ finish. Each woofer is housed in an isolated chamber and the enclosure is heavily braced to maximize low-frequency performance. The attractive CNC machined, 16 gauge steel grille is internally lined with acoustically transparent foam to provide additional driver protection and give a very professional appearance. SPECIFICATIONS: System Type: Dual 18″ bass-reflex subwoofer Frequency Range (-10 dB): 27 Hz – 220 Hz Frequency Response (±3 dB): 33 Hz – 220 Hz Dimensions (H x W x D): 602 mm x 1067 mm x 838 mm Net Weight: 76 kg (166.5 lb) LF Driver: 2 x JBL 2268H Differential Drive® woofer Sensitivity (1w/1m): 98 dB SPL Nominal Impedance: 4 ohms (parallel mode), 8 ohms x 2 (discrete mode) Rated Maximum SPL: 136 dB SPL @1 m (3.3 ft) Power Rating (Continuous/Program/Peak): 1600 W / 3200 W / 6400 W
