The 12S SUB is a compact, high-performance subwoofer designed to support and extend low-frequency output in professional fixed installation environments. Developed as part of the xS Series by d&b audiotechnik, the 12S SUB integrates seamlessly with xS Series loudspeakers to provide enhanced bass reproduction in a wide range of applications, including houses of worship, education facilities, hospitality venues, conference centres, and sports halls. The 12S SUB features a 12-inch long excursion neodymium driver in a bass-reflex enclosure, engineered for controlled and precise low-end response. Its flexible deployment options allow it to be used as a standalone unit, flown, or stacked, making it suitable for diverse architectural and acoustic environments. Constructed from marine-grade plywood and finished in impact-resistant black or white paint, the 12S SUB complies with DIN 18032-3 Ball Impact Resistance standards, ensuring durability in high-traffic areas. In addition, the product is available with Special Colour (SC) and Weather Resistant (WR) options, allowing adaptation to both aesthetic and environmental requirements. The 12S SUB plays a critical role in delivering intelligible, full-range sound reinforcement where low-frequency clarity and structural resilience are essential. For professional integrators and system designers, it offers a reliable low-frequency solution that aligns with the rigorous performance standards of the wider d&b system portfolio.