L-Acoustics SB28, Руководство пользователя

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SB28
Subwoofer Enclosure
USER MANUAL
VERSION 1.1
SB28_UM_ML_1.1 w w w . l - a c o u s t i c s . c o m 16 en
9 SPECIFICATIONS
Reference SB28
Frequency response
Low frequency limit (-10dB) 25 Hz ([SB28_100] preset)
Maximum SPL 1 140 dB ([SB28_100] preset)
Nominal directivity
Single element Omni-directional
Cardioïd array Maximum rejection to the rear: 12 dB
Transducer 2 x 18’’ weather-resistant direct radiating transducers mounted into a single
vented bandpass enclosure fitted with progressive profile vents.
Nominal impedance 4 Ω
Connectors 1 x 4-point Speakon ®
Dimensions (W x H x D) 1300 x 550 x 700 mm
Ö
51.2 x 21.7 x 27.6 in.
Weight 93 kg Ö 205 lb.
Shipping
Ö
L-ACOUSTICS ® SB28PLA front dolly (available as an option).
Ö
L-ACOUSTICS ® SB28COV protective cover (available as an option).
Flying vertical array
Ö
Available as a future development.
Stacking vertical array
Ö
Two stacking runners and two runner guides. Certified for up to 6 SB28
(secure the array using appropriate material).
External structure
Material 18 and 24 mm Baltic birch plywood.
Finish Grayish-brown RAL 8019 ® .
Front Sandblast-coated steel grill, acoustically neutral ‘‘Airnet’’ cloth.
Handles Integrated into the cabinet.
Rigging components Sandblast-coated high-grade steel.
1
Peak level measured at 1m under half space conditions using 10 dB crest factor pink noise with specified preset and corresponding EQ settings.
FRONT REAR
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