Features

The SWX121 is a 21” passive subwoofer system engineered for nightclubs, outdoor venues, and any environment demanding extreme low-frequency performance. With a frequency response of 28Hz to 300Hz (-3dB), this subwoofer delivers bone-rattling bass that immerses listeners in every pulse and beat. Powered by a single 21-inch neodymium driver with a 6-inch voice coil, the SWX121 combines exceptional sensitivity (102dB at 1W/1M) with a thunderous maximum SPL of 139dB.

Designed for relentless output, it handles 1500W AES power and peaks at an explosive 6000W, all within a 4-ohm nominal impedance for seamless integration into professional setups. Encased in durable 18mm birch plywood with a rugged black polyurea finish, the SWX121 features four heavy-duty handles (two per side) and stacking grids for easy rigging. Connectivity is a breeze with three Neutrik® Speakon NL4 ports (one front, two rear), while a weatherproof, dust-proof steel grille ensures reliability in any condition.

Whether you are deploying it in night club or an open-air event, the SWX121 sets the benchmark for depth, power, and durability in low-frequency reproduction.