Instruction Manual for LA4 with 1.0.X Firmware – REV A Page 27
Advanced Feature Details
PRESET Mode
The PRESET mode sets the output level to a
fixed level. There are separate presets
enables for each input. Each can be set to a
different level if desired. These can be set on
the VOLUME SETUP screen which is
accessed from the INPUT SETUP screen.
Auto-On Function
The LA4 can be programmed to automatically
turn on whenever AC power is applied. This
function allows automation using switched AC
outlets. When AUTO-ON is enabled, the LA4
cannot be turned off without removing AC
power.
The AUTO-ON function is programmed on
the POWER screen.
If AUTO-ON is enabled, the power switch will
mute all of the outputs, but will not turn the
unit off. Likewise, the OFF button on the
remote will mute all of the outputs.
Tip: Turn the VOLUME up to release MUTE
and return to the prior volume setting.
Bi-directional 12V Trigger
Benchmark has reinvented the 12 volt trigger
by adding bi-directional signaling. The trigger
connection on the LA4 can be used as an
input, an output, or both. It is compatible
with any common 12 volt trigger input or
output.
The 12V TRIGGER I/O can be used to turn
other audio components on when the LA4
turns on. The LA4 can also turn on and off in
response to other connected components. The
Benchmark bi-directional 12V Trigger is
compatible with virtually all trigger systems.
The 12V TRIGGER I/O can be connected to
the trigger input or output ports on a D/A
converter, power amplifier, or both.
The LA4 can send a 12 Volt DC trigger signal
to start other components in the system, or it
can wake up in response to an externally
generated trigger signal.
The trigger modes can be set using the
POWER screen.
Auto Trigger Mode
By default, the trigger ports are set to AUTO
TRIGGER mode. In this mode, the LA4
automatically configures its trigger I/O ports
as inputs (slave) or outputs (master) as
needed. This mode is recommended for most
applications. In AUTO TRIGGER mode, the
LA4 will always turn other devices on and off.
It will also respond when other devices force
the trigger line high or low.
Master Trigger Mode - (Output Only)
In MASTER TRIGGER mode, the LA4 will
ignore external inputs to the trigger ports.
The LA4 will force the trigger ports to 12
volts DC when the unit is ON, and will force
the ports to 0 volts while the unit is turning
OFF.
Slave Trigger Mode - (Input Only)
In SLAVE TRIGGER mode, the LA4 will not
drive the trigger ports. The ports will be
configured for input only. The LA4 will turn
on and off in response to the trigger signal
supplied by other system devices.
Typical Trigger Applications
Typical trigger applications:
• LA4 → Amplifier
• LA4 → Amplifier → Amplifier
• LA4 → DAC & LA4 → Amplifier
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