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KS21

原价

￥ 3700.00

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￥ 3400.00

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Maximum SPL: 138 dB
Dimensions (W, H, D): 762 mm, 576 mm, 620 mm / 30 in, 22.7 in, 24.4 in
Weight (net): 49 kg / 108 lb

Short description

High-power subwoofer featuring a single 21 in speaker with high excursion driver and optimized laminar vents to maximize LF efficiency - deployed in omnidirectional or cardioid patterns in stacked or flown configurations.

Description

Passive subwoofer with a high-excursion, direct-radiating 21 in transducer mounted in a bass-reflex tuned enclosure with laminar vents for increased LF efficiency. The enclosure cabinet is constructed of premium grade Baltic beech and birch plywood. The transducer front is protected by a coated steel grill and an acoustically transparent fabric. The enclosure integrates four ergonomic handles, and panel corner stops for enclosure protection. The captive flush-fitting hardware allows for rigging and combining with other loudspeakers of the same family. Dedicated rigging accessories allow for flown or stacked configurations. Combining two or more elements with associated presets achieve omnidirectional or cardioid directivity patterns. Exclusively driven and protected by a proprietary amplified controller through a dedicated preset.

Technical requirements

Coverage:

· Enclosure directivity: standard or cardioid configuration

Transducers:

· LF transducer: 21" neodymium cone driver

Acoustics:

· Nominal impedance: 8 Ω

· Usable bandwidth: 29 Hz - 83 Hz (-10 dB), 32 Hz - 71 Hz (-6 dB), 35 Hz - 60 Hz (-3 dB) / 31 Hz - 100 Hz (-10 dB), 35 Hz - 87 Hz (-6 dB), 40 Hz - 78 Hz (-3 dB)

· RMS power handling (Calculated using the mean impedance measured on the usable bandwidth): 467 W

· Maximum SPL: 138 dB Peak level at 1 m under half space conditions using pink noise with crest factor 4

Physical data:

· Acoustical load: bass-reflex

· Cabinet: premium grade Baltic beech and birch plywood

· Dimensions (W, H, D): 762 mm, 576 mm, 620 mm / 30 in, 22.7 in, 24.4 in

· Weight (net): 49 kg / 108 lb

· Connectors: 2 × 4-point speakON

· IP: IP55

· Finish: dark grey brown Pantone 426 C

Product name: KS21

Manufacturer: L-Acoustics