High Pass" Mode; 7.3.1 Connecting To The La4 - L-Acoustics 115XT HiQ Manuel Utilisateur

7.3

"HIGH PASS" mode

In the ''HIGH PASS'' mode the 115XT HiQ enclosures are 100 Hz high-pass filtered to allow for coupling with the
dedicated complimentary SB118 subwoofers. The bandwidth of the system is extended down to 32 Hz. The
recommended ratio is one SB118 for one 115XT HiQ.
The subwoofer enclosures are connected to additional LA4 or LA8 amplified controllers. Please refer to the ''SB118''
user manual.

7.3.1 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 5).
!
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.
Figure 5: Four 115XT HiQ enclosures connected to an LA4 controller
HiQ_UM_ML_1
OUT 1 (in A)
w w w . l - a c o u s t i c s . c o m
OUT 3 (in B)
EN
13 en