8XT_UM_ML_1
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7.3
“HIGH PASS” mode
In the ‘‘HIGH PASS’’ mode the 8XT 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 a pair of 8XT.
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
Each of the 8XT enclosures is connected to an LA4 output channel ranging from channel 1 through 4 for the first four
cabinets. The additional cabinets are grouped in pairs in parallel with the first ones. Therefore a single LA4 amplified
controller can drive up to eight 8XT enclosures (Figure 5).
Driving eight 8XT 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.
Additional enclosures beyond eight 8XT need to be connected to an additional LA4 amplified controller following the same
wiring procedures. Therefore, each group of 8 additional 8XT requires the addition of a new LA4 amplified controller.
Note:
System resources are optimized for a multiple of four 8XT enclosures.
Figure 5: Eight 8XT enclosures connected to an LA4 controller
7.3.2
[8XT_FR_100], [8XT_FI_100], and [8XT_MO_100] presets
The [8XT_FR_100] preset features a high frequency shelving equalization
and includes a 100 Hz high-pass filter.
The [8XT_FI_100] preset results in a nominally flat frequency response contour and includes a 100 Hz high-pass filter.
!
IMPORTANT
OUT 1 (in A)
OUT 2 (in A) OUT 3 (in B)
OUT 4 (in B)
Summary of Contents for 8XT
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