L-Acoustics 12XT, Руководство пользователя

Страница: 17 / 56

12XT_UM_ML_1-3 w w w . l - a c o u s t i c s . c o m 15
15 15
15 en
EN
7.2.2 “HIGH-PASS” mode
7.2.2.1 Description
In ‘‘HIGH-PASS’’ mode the PASSIVE 12XT enclosures are 100 Hz high-pass filtered to allow using them along with the
dedicated complimentary SB118 subwoofers. The bandwidth of the system is extended down to 32 Hz.
The recommended ratio is one PASSIVE 12XT for one SB118.
7.2.2.2 Connecting the PASSIVE 12XT to the LA4
Each PASSIVE 12XT enclosure must be connected to an LA4 output channel ranging from channel 1 through 4.
Therefore a single LA4 amplified controller can drive up to four PASSIVE 12XT enclosures (see Figure 7).
Note: The system resources are optimized for four PASSIVE 12XT per LA4.
Figure 7: Four PASSIVE 12XT enclosures connected to an LA4 controller
7.2.2.3 [12XTP_FR_100], [12XTP_FI_100], and [12XTP_MO_100] presets
The [12XTP_FR_100] ‘‘FRONT’’ preset features a HF shelving EQ and a 100 Hz high-pass filter for FOH applications
with subwoofers.
The [12XTP_FI_100] ‘‘FILL’’
preset results in a ‘‘flat’’ contour down to 100 Hz in free field conditions for use in speech
reinforcement, classical music, or close proximity fill applications.
The [12XTP_MO_100] ‘‘MONITOR’’ preset results in a ‘‘flat’’ contour down to 100 Hz in half-space loading conditions
for floor monitoring, wall, or ceiling-mounted applications.
Activate the LOAD PRESET menu from the LA4 amplified controller front panel and then select the desired preset.
Refer to the
‘‘LA4’’ user manual for additional instructions. The preset is also accessible using the LA NETWORK
MANAGER software (refer to the ‘‘LA NETWORK MANAGER’’ user manual ). Accessible parameters in ‘‘HIGH-
PASS’’ mode for the PASSIVE 12XT are shown in the following chart:
IN A
IN B
Note: This drawing is only a cabling scheme and does not represent a valid configuration.
OUT 2 (IN A)
OUT 1 (IN A)
OUT 3 (IN B)
OUT 4 (IN B)