Passive subwoofer with two high-excursion, direct-radiating 18 in transducers 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 enclosure front is protected by a coated steel grill and an acoustically transparent fabric. The enclosure integrates six ergonomic handles, two stacking runners and matching top tracks for easy enclosure alignment. The Flush-fitting captive hardware allows for rigging and combining with other loudspeakers of the same family. 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:
Transducers:
Acoustics:
- Nominal impedance: 4 Ω
- Usable bandwidth: 25 Hz – 110 Hz (-10 dB), 29 Hz – 96 Hz (-6 dB), 32 Hz – 76 Hz (-3 dB)
- RMS power handling (Calculated using the mean impedance measured on the usable bandwidth): 1181 W
- Maximum SPL: 142 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): 1340 mm, 719 mm, 565 mm / 52.8 in, 28.3 in, 22.2 in
- Weight (net): 79 kg / 174 lb
- Connectors: IN: 1 × 4-point speakON
- Finish: dark grey brown Pantone 426 C
Product name: KS28
Manufacturer: L-Acoustics
