The J-SUB is an actively driven 2-way bass-reflex subwoofer featuring three long-excursion neodymium 18" drivers. Two drivers are front-facing while one faces the rear, creating a cardioid dispersion pattern that minimizes unwanted energy behind the system. This design significantly reduces low-frequency reverberation and enhances the accuracy of low-frequency reproduction.

J-SUB cabinets can complement J8 and J12 loudspeakers in various configurations, whether ground-stacked or flown. They can be integrated on top of a J8/J12 array or used as a separate column. Constructed from durable marine plywood, the J-SUB cabinet is finished with impact and weather-resistant Polyurea Cabinet Protection (PCP). Both the front and rear are protected by a rigid metal grill, and the side panels feature eight handles for easy handling. Additionally, the cabinet is equipped with four 100 mm wheels and one NL8 connector.