L-Acoustics 12XT, User Manual

Page: 15 / 56

12XT_UM_ML_1-3 w w w . l - a c o u s t i c s . c o m 13
13 13
13 en
EN
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 PASSIVE 12XT enclosures can be used as a standalone system in the
“FULL RANGE’’ mode or in combination
with subwoofers in the
“HIGH-PASS’’
or
“HYBRID’’
modes.
The ACTIVE 12XT enclosures can be used as a standalone system in the “FULL RANGE’’ mode or in combination
with subwoofers in the “HIGH-PASS’’ mode.
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 MONITOR presets have been optimized from the 1.3 to the 2.0 preset library versions.
The LA4 output channel assignment varies with the preset selected by the user.
ALWAYS check that the 12XT 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 PASSIVE 12XT
Configure each 12XT as a PASSIVE enclosure by using the specific switch (see section 6.2).
7.2.1 “FULL RANGE” mode
7.2.1.1 Description
In ‘‘FULL RANGE’’ mode the PASSIVE 12XT enclosures are used in standalone configurations within their nominal
bandwidth (55 Hz - 20 kHz) for applications not requiring low frequency extension.
!
IMPORTANT
!
IMPORTANT
!
IMPORTANT