The EAW SB528zR-BK is a high-output, dual 18-inch passive subwoofer engineered for large-scale sound reinforcement where maximum low-frequency impact and control are required. It is designed as a specialized component for touring systems and major fixed installations, capable of delivering extreme sound pressure levels with deep extension and precise transient response. The subwoofer incorporates advanced driver technology within a carefully tuned, ported enclosure, optimized for high efficiency and powerful bass output that forms the foundational layer for concerts, festivals, and high-energy events. The black (BK) finish and robust construction are tailored for both visual discretion and the physical demands of professional touring.

The enclosure is constructed from high-grade, extensively braced plywood, ensuring minimal cabinet resonance and long-term durability. It features integrated heavy-duty rigging points and handles, allowing for versatile deployment options including ground-stacking, flying, or arraying with other subwoofers. As a passive design, the SB528zR-BK requires external high-power amplification and system processing, giving sound engineers complete control over crossover points, equalization, and limiting to perfectly integrate the subwoofer with the main loudspeaker system and protect its components. This combination of brute-force output capability and flexible system integration makes it a top-tier choice for audio professionals who demand uncompromising low-frequency performance.