12XT_UM_ML_1.2
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Table 3: Accessible controls in ‘‘HIGH-PASS’’ mode for PASSIVE 12XT
Accessible (O) and blocked (X) controls
LA4 Inputs/Outputs Elements to connect
Preset
assignments*
Mute Gain Delay Polarity
IN A Input signal A IN_A X O O O
IN B Input signal B IN_B X O O O
OUT 1 PASSIVE 12XT PA_A O O O O
OUT 2 PASSIVE 12XT PA_A O O O O
OUT 3 PASSIVE 12XT PA_B O O O O
OUT 4 PASSIVE 12XT PA_B O O O O
* IN: input signal. A: channel A. B: channel B. PA: passive enclosure.
Note: The complimentary SB118 subwoofers must be connected to additional LA4 or LA8 amplified controllers. Please
refer to the ‘‘SB118 - User Manual’’.
7.2.3 “HYBRID’’ mode
In the ‘‘HYBRID’’ mode the PASSIVE 12XT and SB118 enclosures are connected to the same LA4 amplified controller
thus limiting the number of required units. The bandwidth of the system is extended down to 32 Hz. The
recommended ratio is one PASSIVE 12XT for one SB118.
7.2.3.1 Connecting PASSIVE 12XT and SB118 to LA4
The PASSIVE 12XT and SB118 enclosures connect to the LA4 outputs as follows: channels 1 and 3 are dedicated to
both SB118 enclosures, channels 2 and 4 are dedicated to both PASSIVE 12XT. Therefore, a single LA4 amplified
controller can drive up to two PASSIVE 12XT and two SB118 enclosures (Figure 8).
A maximum of one SB118 enclosure can be connected per LA4 output channel 1 or 3.
Note: The system resources are optimized for two PASSIVE 12XT and two SB118 per LA4.
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