KS21

The L-Acoustics KS21 is a high-power, compact subwoofer designed to extend the bandwidth of A15 and A10 systems. Featuring a 21" direct-radiating transducer in a bass-reflex enclosure with L-Vents, it delivers exceptional low-frequency performance with minimal turbulence noise.

• High-Performance Design: Equipped with a 21" neodymium driver and laminar vented ports for enhanced LF efficiency and reduced port noise
• Versatile Deployment: Supports standard and cardioid configurations; compatible with A15 and A10 systems for flown or stacked setups
• Durable Construction: Built from premium Baltic beech and birch plywood with a weather-resistant IP55 rating
Frequency Response (-10 dB): 29 Hz – 100 Hz
Maximum SPL: 138 dB
Transducer: 1 × 21" neodymium cone driver
Nominal Impedance: 8 Ω
Connectors: 2 × 4-point SpeakON® (IN and LINK)
Rigging and Handling: Two-point rigging system, M20 pole mount insert, 4 handles, 8 corner stops, and 2 ground runners
Dimensions (W × H × D): 30" × 22.5" × 22.7" (762 × 571 × 576 mm)
Weight: 108 lbs (49 kg)
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