J-SUB is a bi-amplified 2-way bass-reflex subwoofer incorporating three 18 “long-excursion neodymium speakers, two of which are mounted on the front panel and one on the rear panel. which derives from this architecture avoids the unwanted projection of energy behind the system, which thus benefits from a considerable reduction of the reverberated field at the serious frequencies and therefore translates into an incomparable reproduction precision.The J-SUB systems can be used to complement the J8 and J12 systems in various combinations, either on the ground or suspended, either integrated into the column at the top of the J8 / J12 array, or in independent J-SUB columns. built in marine plywood covered with the exclusive PCP (Polyurea Cabinet Protection) treatment to protect against shocks and atmospheric agents.The front and back panels are protected by a rigid metal grid ca, while on each side panel there are four handles. Four 100mm wheels and an EP5 or NL8 connector complete the rear panel.