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L-Acoustics KS21

L-Acoustics KS21


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Product Highlights

  • High Power Subwoofer: The KS21 features a 21" transducer, delivering exceptional impact with a high power-to-size ratio.
  • Advanced Technology: Equipped with L-Vents technology for clear low-frequency power and minimal turbulence noise.
  • Versatile and Durable: Designed for both standard and cardioid configurations, suitable for rigorous touring conditions.
  • Compact and Rigging-Friendly: Lightweight for ease of flying under stringent rigging conditions, ensuring versatility in various event setups.
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The KS21 subwoofer from L-Acoustics is a powerhouse in a compact form. Its 21" transducer ensures an exceptional impact, making it ideal for event organizers who need a high power-to-size ratio. The incorporation of L-Vents technology minimizes turbulence noise, enhancing the clarity of low frequencies. Its design allows for both standard and cardioid configurations, making it versatile for different acoustic environments. Additionally, its rugged construction and lightweight design make it suitable for touring, with easy and fast rigging capabilities.

Acoustical Specifications

  • Max SPL: 138 dB
  • Low Frequency Limit: 29 Hz
  • Transducers: LF: 1 x 21"
  • Nominal Directivity: Standard or cardioid configuration
  • Acoustical Load: Bass-reflex, L-Vents
  • Nominal Impedance: 8 Ω

Physical Specifications

  • Weight: 49 kg / 108 lb
  • Connectors: 2 x 4-point terminal block with push-in connection
  • Rigging and Handling: External rigging kits, M6 inserts for rigging plates, M8 inserts for A-U15i, 1 DIN580-compatible M8 threaded insert
  • Cabinet Material: Premium grade Baltic beech and birch plywood
  • Grill: Coated steel, acoustically neutral 3D fabric
  • Rigging Components: High grade steel with anti-corrosion coating
  • Finish: Dark grey brown Pantone 426 C
  • IP Rating: IP55