Instruction Manual for LA4 with 1.0.X Firmware ā REV A Page 24
of voices within a well-defined 3D stereo
image.
Rotary Encoder
The volume control knob features a high-
quality optical encoder that is rated for heavy
use. An acceleration feature makes it easy to
move through the 256 volume steps while
maintaining 0.5 dB/step resolution. A press of
the control knob will wake up the screen if the
screen timers are in use.
Convenience Features
The LA4 includes an on-screen mute button.
The outputs can also be muted with the
volume knob or with the optional remote
control.
The LA4 includes an on-screen -20 dB button
that fades the level down by 20 dB. This
function provides a temporary volume
reduction and an easy return to the previous
listening level. This control makes it easy to
transition between a normal listening level
and a background level. The -20 dB DIM
function is also accessible from the optional
remote control.
Inputs may be renamed and unused inputs
may be disabled. Input levels can be trimmed
to provide input-to-input level matching.
Screen brightness is adjustable and timers
can be set to dim or shut off the display. The
setup screen can be locked to prevent access
to advanced features.
12V Trigger
The LA4 has two trigger ports. These can be
connected to other audio components so that
the entire audio system can turn on and off in
a sequenced fashion. The LA4 will pull the
trigger I/O to 12 volts DC while the LA4 is
on. If the LA4 is off and an external device
pulls the trigger I/O to 12 volts, the LA4 will
turn on.
The trigger ports are bi-directional by default,
but they can be configured as inputs or
outputs.
Auto-On Function
The LA4 can be programmed to automatically
turn on when AC power is applied.
Casework
The LA4 is available with a black or silver
faceplate and is designed to match the
Benchmark AHB2 power amplifier. It
occupies the same footprint as the
Benchmark DAC1, DAC2 and DAC3
converters. The case features a milled
faceplate and milled sides. Top, bottom, and
rear panels are made from thick aluminum
and feature a brushed texture. The LA4 is
built to last and will be a fine addition to your
listening space.
Equipment Placement
Locate the LA4 where the side panels are
exposed to air. These panels help dissipate
heat and should not be obstructed.
The IR sensor for the remote control is
located to the right of the power switch on
the front panel. Make sure this is visible from
your listening position.
The LA4 does not emit strong magnetic fields
and for this reason, it will not create
interference with audio devices that are
placed above or below the LA4.
Please note that most power amplifiers emit
strong magnetic fields. In most cases, the
LA4 should not be stacked directly above or
below a power amplifier. Allow at least a few
inches of space above or below a power
amplifier. The magnetic fields produced by
the power amplifier may interfere with the
LA4. One exception is the Benchmark AHB2
power amplifier. The LA4 can be stacked
directly above or below an AHB2 without any
risk of magnetic interference from the power
amplifier.
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