The 27S SUB is a compact, high-performance cardioid subwoofer designed to deliver precise low-frequency reinforcement for both fixed installations and mobile applications. Engineered for compatibility with the d&b xS Series and xA Series loudspeakers, the 27S SUB operates via a single amplifier channel and employs an integrated cardioid design to optimise directivity and minimise rearward sound emissions. This configuration includes a front-facing 15-inch driver housed in a bass-reflex enclosure and a rear-facing 12-inch driver positioned in a dual-chamber bandpass design. The result is enhanced low-end control and improved clarity in acoustically sensitive environments.

Constructed from marine-grade plywood and finished with a robust black paint coating, the 27S SUB is built to withstand the demands of professional use. It is compliant with DIN 18032-3 standards for impact resistance, making it suitable for environments such as sports halls and educational institutions. Flexible in deployment, the 27S SUB can be used as a stand-alone unit, in stacked configurations, or flown individually. The enclosure includes dual NL4 connectors, a two-pole screw terminal block, and M10 threaded inserts for secure mounting. The product is available in all RAL colours through the Special Colour (SC) option, and a Weather Resistant (WR) version is rated IP55 for reliable outdoor use. The 27S SUB provides consistent performance and directional control, making it a dependable solution for integrators and system designers working in diverse acoustic environments