L-Acoustics 8XTi, Руководство пользователя

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7 7 7 7 OPERATION OPERATION OPERATION OPERATION
7.1 System configuration
The choice of a system configuration should be the result of an electro-acoustic study conducted by an expert (System
Engineer or Audio Consultant). However, this will not be discussed here as sound-design aspects are beyond the scope
of this manual. This study can rely on the simulations modeled in SOUNDVISION software, yielding electro-acoustic
predictions which take into account the enclosures’ manufacturer data and particular situational usage, as well as the
projected environment.
Three operation modes (“FULL RANGE”, “HIGH-PASS”, and “HYBRID”), each one associated with a set of factory
presets, will allow building all the common configurations (C, LR, LCR, distributed…).
The 8XTi enclosures can be used as a standalone system in the
“FULL RANGE’’ mode or in combination with
subwoofers in the “HIGH-PASS’’ and “HYBRID’’ modes.
For each mode a distinction is drawn between
‘‘FRONT’’ , ‘‘FILL’’ , and ‘‘MONITOR’’ presets as they respectively
match front-of-house, distributed, and half-space loading applications.
•
The LA4 output channel assignment varies with the preset selected by the user.
•
ALWAYS check that the 8XTi enclosures are connected to correct LA4 output channels before
operating.
Note: The latest version of the preset library can be supplied by an L-ACOUSTICS
®
authorized representative and is
also downloadable from the L-ACOUSTICS
®
web site at www.l-acoustics.com .
7.2 “FULL RANGE” mode
7.2.1 Description
In ‘‘FULL RANGE’’ mode the 8XTi enclosures are used in standalone configurations within their nominal bandwidth
(65 Hz – 20 kHz) for applications not requiring low frequency extension.
7.2.2 Connecting the 8XTi to the LA4
Each 8XTi enclosure must be connected to an LA4 output channel ranging from channel 1 through 4. An additional
8XTi enclosure can be connected in parallel with each of the first ones. Therefore, a single LA4 amplified controller can
drive up to eight 8XTi enclosures (see Figure 4).
Note: The system resources are optimized for four or eight 8XTi per LA4.
Figure 4: Eight 8XTi enclosures connected to an LA4 controller
IN A
IN B
OUT 2 (IN A)
OUT 1 (IN A)
OUT 3 (IN B)
OUT 4 (IN B)
!
IMPORTANT
This figure is a
cabling scheme and
does not represent
a valid configuration.
!
CAUTION