JBL SRX728S Features:
High-power subwoofer
2 – 2268H Differential Drive, neodymium magnet, 18′′ woofers
Power Rating (Continuous/Program/Peak): 1600W/3200W/6400W
Front-loaded vented enclosure
2 Neutrik Speakon NL-4 connectors
External switch selects either contacts +1/-1 or +2/-2
Internal connector separates each woofer into 2 channels
Birch plywood construction
Heavily braced
Rugged DuraFlex finish
Isolated chamber for each woofer
CNC machined, 16-gauge steel grille.