Operation; 115Xt Hiq System Configuration; Full Range" Mode; 7.2.1 Connecting To The La4 - L-Acoustics 115XT HiQ Manuel Utilisateur

7

OPERATION

7.1

115XT HiQ system configuration

The choice of a final XT system configuration should be the result of an electro-acoustic study conducted by an expert
(System Engineer or Audio Consultant), which 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, yielding electro-acoustic predictions
taking into account the manufacturer's 115XT HiQ data, its particular situational usage, and its projected environment.
Various configurations in accordance with system recommendations are possible. Each configuration is associated with a
specific operation mode and its related factory preset. Other hazardous or non conforming configurations do not
correspond to approved operation modes and therefore are not supported by a factory preset.
Note: The latest version of the preset library can be supplied by L-ACOUSTICS authorized representative and is also
downloadable on the L-ACOUSTICS internet website @ www.l-acoustics.com.
The 115XT HiQ enclosures can be used either in a standalone configuration 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 applications, and half-space loading operating conditions. The user can either select
presets using the LA4 front panel interface or the LA NETWORK MANAGER software.
!
LA4 output channel assignment varies upon the preset selected by the user. Always check that the
115XT HiQ is connected to the correct output channel before operating.
IMPORTANT
7.2

"FULL RANGE" mode

In ''FULL RANGE'' mode the 115XT HiQ enclosures are used in standalone configurations within their nominal
bandwidth, for applications not requiring low frequency extension.

7.2.1 Connecting to the LA4

The first two 115XT HiQ enclosures are connected to output channels 1 and 3 of the LA4 controller. The additional
cabinets are grouped in pairs in parallel with the first ones. Therefore a single LA4 amplified controller can drive up to
four 115XT HiQ enclosures (Figure 4).
!
Driving four 115XT HiQ enclosures with a single LA4 amplified controller solicits system resources
to their limits and can trigger the thermal protection feature of the controller. This configuration has
to be avoided when the power requirements are extreme and continuous over a long period.
IMPORTANT
Additional enclosures beyond four 115XT HiQ need to be connected to an additional LA4 amplified controller
following the same wiring procedures. Therefore, each group of 4 additional 115XT HiQ requires the addition of a new
LA4 amplified controller.
Note: System resources are optimized for a multiple of two 115XT HiQ enclosures.
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