L-Acoustics 112XT, Руководство оператора

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L-ACOUSTICS XT Manual V1.1 2/11/2003
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Loudspeaker focus or aiming can be adjusted so that maximum HF energy is directed towards the
farthest listening areas, therefore balancing the SPL attenuation with distance that occurs in the direct
field. At closer listening positions, the off-axis attenuation at higher frequencies provides a similar tonal
balance and the attenuation with distance is less.
The coaxial configuration therefore provides the optimum directivity required in order to obtain even
coverage and constant tonal balance in a typical semi-reverberant auditorium. Extensive sound design
and installation experience acquired by L-ACOUSTICS over the years confirms this and we are
confident that coaxial, axi-symmetric loudspeaker enclosures are the best tools for multiple source,
distributed sound design.
The coaxial performance of the 112XT and 115XT loudspeaker enclosures provide the basic starting
tools for distributed sound reinforcement design.
1. THE XT SYSTEM
The XT line consists of: 112XT, 115XT loudspeaker enclosures, XT rigging accessories and SB115,
SB118, SB218 or dV-SUB subwoofers. OEM factory presets are provided for approved digital signal
processors (XTA DP224, DP226 and BSS 366). Please note that amplifier racks plus loudspeaker
cables are not specified but should meet the minimum specification requirements outlined below.
1.1 XT SYSTEM COMPONENTS
LOUDSPEAKER ENCLOSURES
(1) 112XT
Active 2-way coaxial loudspeaker with 90 degree axi-symmetrical coverage, containing 12”
loudspeaker, 1.4” exit high frequency compression driver
(2) 115XT
Active 2-way coaxial loudspeaker with 80 degree axi-symmetrical coverage, containing 15”
loudspeaker, 1.4” exit high frequency compression driver
SUBWOOFER ENCLOSURES
(3) SB115
Front-loaded, bass-reflex design, single 15’’ subwoofer for low frequency extension
(4) SB118
Dual-vented bandpass-loaded, single 18’’ subwoofer for high level, extended bandwidth
(5) SB218
Front-loaded, bass-reflex design, dual 18’’ subwoofer for high level, extended bandwidth
(6) dV-SUB
Dual-vented bandpass-loaded triple 15” subwoofer for high level, low frequency extension
For more information concerning SB115, SB118 and SB218 subwoofer enclosures please consult the SB
Subwoofer User’s Manual