Instruction Manual for LA4 with 1.0.X Firmware ā REV A Page 13
Connecting Benchmark
Components
Benchmark AHB2 Power Amp
1. Set the SENSITIVITY switch on the
AHB2 to 22 dBu (switch in the down
position).
2. Connect either trigger port on the
AHB2 to either trigger port on the
LA4. If you are using two AHB2
amplifiers in bridged mono, the second
amplifier can be connected to an
unused trigger port on the LA4 or the
other amplifier.
3. Connect the left and right XLR outputs
on the LA4 to the left and right XLR
inputs on the amplifier. If you are
using two amplifiers in bridged mono
mode, connect the cables to the
MONO input on each amplifier.
4. If you are using a single AHB2, set
the MODE switch on the back of the
amplifier to STEREO. If you are using
two AHB2 amplifiers, set the MODE
on each to MONO.
Tip: If you turn the system on or off using
the LA4 or the remote control, the amplifiers
will follow.
Tip: If you want to shut down the entire
system using the POWER switch on an
amplifier, you will need to press and hold the
switch for 3 seconds.
Benchmark DAC
1. Set the XLR output attenuators in the
DAC to 0 dB. You will need to open
the cover on the DAC if these jumpers
need to be changed.
2. If your DAC has a trigger port, connect
it to either port on the LA4. This
trigger connection provides a control
link so that the remote, DAC or LA4
can be used to turn the entire system
on or off in a sequenced fashion.
3. Use XLR cables to connect the DAC to
INPUT 1 on the LA4. This input
supports a special DAC compatibility
mode.
4. If your Benchmark DAC has a
'DAC-ONLY MODE', enable this mode.
This will bypass the VOLUME, MUTE
and DIM controls on the DAC.
5. If your Benchmark DAC does not have
a 'DAC-ONLY MODE', set every input
on the DAC to 'HT' mode, or
'CALIBRATED' mode. This will bypass
the volume control on the DAC, but IR
remote MUTE and DIM controls may
still be active on some DAC models.
6. If you are using a Benchmark DAC3 B,
leave the CONTROL LOCK off unless
you only have one digital source.
If you have a Benchmark DAC with remote
control, the LA4 has a special mode of
operation that allows both devices to be
controlled from a single remote. If your
Benchmark DAC has remote control, follow
this additional step:
7. Go to the REMOTE settings screen on
the LA4 and select 'BENCHMARK
DAC ON XLR1'. The Benchmark IR
remote control will now control both
devices. The LA4 will provide volume
control and switching between analog
inputs. The DAC will provide switching
between digital inputs.
Tip: Use the dedicated digital input select
buttons (USB, D1, D2, D3 and D4) to select
digital inputs on the DAC. Use the INPUT
scroll buttons on the remote to select analog
inputs on the LA4. Use the dedicated
ANALOG button on the remote to select the
analog inputs on the DAC (if any).
Tip: We recommend using the direct analog
inputs on the LA4 before using the analog
inputs on the back of the DAC. The direct
connections on the back of the LA4 will
provide better performance.
Tip: Use the VOLUME UP key on the remote
if you wish to release the MUTE and DIM on
all devices.
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