L-Acoustics SB28 High Power Subwoofer 2x18-Inch

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. Integrated rails allow for flown configuration 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.

Specifications:

• Coverage:
  • Enclosure directivity: standard or cardioid
• Transducers:
  • LF transducer: 2 × 18" neodymium direct-radiating
• Acoustics:
  • Nominal impedance: 4 Ω
  • Usable bandwidth: 25 Hz - 117 Hz (-10 dB), 30 Hz - 90 Hz (-6 dB), 33 Hz - 70 Hz (-3 dB)
  • RMS power handling (Calculated using the mean impedance measured on the usable bandwidth): 655 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 birch plywood
  • Dimensions (W, H, D): 1300 mm, 550 mm, 700 mm / 51.2 in, 21.7 in, 27.6 in
  • Weight (net): 93 kg / 205 lb
  • Connectors: IN: 1 × 4-point speakON
  • Finish: dark grey brown Pantone 426 C