Passive large format low-end extension with two high-excursion, direct-radiating 15 in transducers mounted in a bass-reflex tuned enclosure with laminar vents for increased LF efficiency. The enclosure cabinet is constructed of premium grade Baltic beech and birch plywood. The enclosure front is protected by a coated steel grill and an acoustically transparent fabric. The enclosure integrates four ergonomic handles and a four-point flush-fitting hardware for rigging and combining with other loudspeakers of the same family. Exclusively driven and protected by a proprietary amplified controller through a dedicated preset.