QS218 High-Performance High-Efficiency Subwoofer | Redefining Low-Frequency Impact

Acoustic Design: High-Impact Sub-Bass, Precision Directivity Control

QS218 Deploy an advanced bandpass horn-loaded acoustic topology， fine-tuned for outdoor touring and ground-stacked applications, increasing efficiency by 3dB across the critical 32Hz ultra-low frequency spectrum compared to conventional bass-reflex architectures to release high-impact acoustic energy.

Integrate dual 18-inch transducers custom-developed by B&C Speakers Italy, equipping each driver with a long-excursion diaphragm, a massive 4.5-inch (116 mm) voice coil, a specialized waterproof cone, and a triple-roll surround to handle a staggering 6800W music power capacity.

Combine a high-flux neodymium magnetic assembly with a dual-spider suspension to secure extreme linear excursion, executing sharp transient response and dynamic, solid sub-bass with tactile low-end texture.

Build cardioid subwoofer arrays in multiples of three enclosures by physically reversing one cabinet to face rearward and recalling matching amplifier DSP cardioid presets. Active directivity control suppresses rearward low-frequency radiation, keeping stage areas free from sub-bass bleed and concentrating clean energy into the audience plane.

Structural Integrity: Heavy-Duty Protection, Rapid Deployment

• Construct the enclosure using high-density multi-ply birch plywood finished in a tough black PU wear-resistant coating for impact protection. A front steel grille reinforced with custom internal ribs and oversized perforations protects the internal transducers while minimizing airflow resistance and port turbulence to eliminate mechanical noise at extreme SPL.

• Incorporate ergonomic side handles alongside supplementary rear handles for effortless physical handling. Four top M20 rigging sockets align precisely with four bottom nesting runners to lock stacked cabinets securely against displacement, while four side rubber feet accommodate horizontal or vertical positioning.

• Streamline system assembly using an integrated aluminum-magnesium alloy quick-lock rigging structure, enabling rapid, secure locking between adjacent enclosures to shorten load-in times and maximize venue deployment efficiency.

Deployment & Integration: Universal Adaptability, System-Level Synergy

QS218 Apply across high-demand professional environments, including large-to-medium outdoor festivals, civic centers, professional theaters, DISCO PUBs, music clubs, performing arts arenas, high-end KTVs, and night clubs.

Anchor the low-frequency system core by pairing seamlessly with full-range enclosures like RL15, RL2, and RX12 under matched factory presets, optimizing frequency response and coverage across the soundfield to ensure acoustic integrity for complex system configurations.