The image shows two JBL SRX728S subwoofers, a high-power subwoofer system designed for professional audio applications.
Here's more information about the JBL SRX728S:
Components: Each unit contains two 18-inch 2268H Differential Drive woofers with neodymium magnets, housed in a front-loaded, vented enclosure.
Power Handling: It can handle a continuous power of 1600W, with a program power of 3200W and a peak power of 6400W in parallel mode.
Design: The enclosure is constructed from top-quality birch plywood and coated with rugged DuraFlex. It features a powder-coated, 16-gauge perforated steel grille with acoustically transparent foam backing.
Connectivity: The system offers flexible input connection options with two Neutrik Speakon jacks and a recessed external switch for selecting different input modes (+1/-1 or +2/-2).