S 21i is a compact, high-performance passive subwoofer for fixed installations, designed to complement our FR-X, ARES 8 and ARES 12 series in theatres, houses of worship, live music venues, stadiums, and other sound reinforcement applications.
S 21i houses a long excursion 21″ neodymium driver and combines front diffusion, bass reflex and transmission line design for maximum efficiency and outstanding SPL.
Deployed standalone, stacked, or flown, S 21i adapts to mirror the needs of the venue and offers huge space and weight savings compared to industry-standard 2×18” subs.
S 21i is built with pride in Belgium and coated in tough, weather-resistant polyurea to safeguard your investment. The cabinet front is protected by a rigid metal grill, backed by acoustically transparent foam.
S 21i can be quickly deployed in any configuration, including cardioid and end-fire, when used with AUDIOFOCUS A Series amplifiers. Armonia presets are also available for Powersoft amplifiers.