L-Acoustics KS21iW High Power Compact Subwoofer 1x21-Inch

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Write a review Q&A SKU: KS21IW PSSL ID#: 206154
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    L-Acoustics KS21iW High Power Compact Subwoofer 1x21-Inch

    KS21i is a compact reference subwoofer designed to extend the bandwidth of A15i and A10i systems in installation applications. KS21i features one high excursion, direct-radiating 21'' transducer mounted in a bass-reflex tuned enclosure. KS21i couples with A15i and A10i to reinforce contour and extend bandwidth to 29 Hz and 31 Hz respectively. KS21i features L-Vents that substantially reduce turbulence and port noise at high levels while also increasing LF efficiency. The association of modern components and laminar vents greatly improves short-term SPL compared to similar-sized subwoofers. The KS21i frequency response is optimized to couple perfectly with both A Series install systems. KS21i can be flown and stacked in combination with A15i or A10i to form a full range line source. KS21i can be deployed in standard or cardioid configurations with dedicated presets, for flown and stacked deployment.


    • Description: High power compact subwoofer: 1 × 21" amplified by LA2Xi2 / LA4X / LA8 / LA12X
    • Low frequency limit (-10 dB): 29 Hz ((KS21_60))
    • Maximum SPL: 138 dB ((KS21_100))
    • Nominal directivity: Standard or cardioid configurations
    • Transducers: 1 × 21" neodymium cone driver
    • Acoustical load: Bass-reflex, L-Vents
    • Nominal impedance: 8 Ω
    • Connectors:
      • 4-point terminal block with push-in connection
      • Connector sealing plate with cable gland
    • Rigging and handling:
      • external rigging kits
      • M6 inserts for rigging plates and accessories
      • M8 inserts for A-U15i
    • Safety: 1 DIN580-compatible M8 threaded insert
    • Weight (net): 46 kg / 101 lb
    • Cabinet: Premium grade Baltic beech and birch plywood
    • Front:
      • Coated steel grill
      • Acoustically neutral 3D fabric
    • Rigging components: High grade steel with anti-corrosion coating
    • Finish:
      • Dark grey brown Pantone 426 C
      • Pure white RAL 9010
      • Custom RAL code on special order
    • IP: IP55


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