The L-Acoustics KS21 is a compact, high-efficiency 21-inch subwoofer designed to extend system bandwidth with authority and precision. A high‑excursion driver, rigid low‑vibration enclosure and L‑Vent laminar ports work together to minimise turbulence and port noise, maintaining punch and articulation even at elevated SPL. At just 49 kg, it is straightforward to deploy and transport, with integrated fittings that support fast, consistent rigging for both rental and fixed installations.
Optimised for use with L-Acoustics amplified controllers such as the LA4X and LA12X, the KS21 integrates seamlessly into wider systems. It supports standard and cardioid deployments, enabling symmetrical or asymmetrical low‑frequency directivity to suit venue constraints, reduce stage spill and improve audience clarity. Equally at home ground‑stacked or flown in arrays, it delivers tight, musical low end with the headroom demanded by modern productions.
Ideal for touring, live music, theatres, clubs and corporate AV, the KS21 offers refined low‑frequency control in a compact footprint, making it a versatile choice wherever impactful, controlled bass is required.
Includes
- L-Acoustics KS21 Subwoofer – Compact, high-output 21-inch
STAGE4.4.100.100