L-Acoustics - KS21

L-Acoustics - KS21

KS21 is a compact reference subwoofer designed to extend the bandwidth of A15 and A10 systems. KS21 features one high excursion, direct radiating 21‘‘ transducer mounted in a bass-reflex tuned enclosure.
KS21 operates from 29 Hz to 60 Hz when associated with A15 or 30 Hz to 100 Hz when associated with A10. KS21 features L-Vents that substantially reduce turbulence and port noise at high levels while also increasing LF efficiency. 

The KS21 frequency response is optimized to couple perfectly with both systems. KS21 features a two-point, integrated rigging system that is compatible with A15. Combinations of KS21 and A15 can be flown or stacked to form a full range line source. KS21 also integrates a threaded insert to enable pole-mount configurations of A15 or A10. KS21 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 LA4X / LA8 / LA12X

Usable bandwidth (-10 dB): 31 Hz - 100 Hz ([KS21_100])

Maximum SPL1: 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: IN: 1 × 4-point speakON

LINK: 1 × 4-point speakON

Rigging and handling: Flush-fitting two-point rigging system

1 pole mount with M20 x 150 insert

4 handles, 8 corner stops and 2 ground runners

Weight (net): 49 kg / 108 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