Instruction Manual for LA4 with 1.0.X Firmware ā REV A Page 14
Basic Features
Input Selection
Use the input selection arrows to scroll
through the enabled inputs. These arrows are
displayed on the HOME screen and are also
available on the REMOTE.
Volume Control
The volume bar graphs shows the current
gain between the line input and line output. 0
dB is unity gain. At 0 dB, the voltage at the
balanced input will match the voltage at the
balanced output. Likewise, there will be unity
gain between the unbalanced inputs and the
unbalanced outputs. The XLR outputs are
always 15.8 dB hotter than the RCA outputs.
15.8 dB is the standard difference between
professional balanced XLR outputs and
consumer unbalanced RCA outputs.
Tip: If an upstream device has consumer-
grade balanced XLR outputs, set the LA4
input BOOST to 10 dB on that XLR input. The
BOOST function makes it easy to mix
consumer and professional components in a
single system. It also compensates for the
level differences between balanced and
unbalanced inputs.
Balance Adjust
Press the BAL button on the HOME screen to
change the L/R balance of the line outputs.
MUTE Function
When MUTE is toggled on, the audio is
immediately muted. When MUTE is toggled
off, the volume will fade back up to the
original level.
Note: The ultra-fine 0.5 dB resolution of the
256-step relay gain control and the precision
timing of the relay closures give the
Benchmark system the ability to execute a
volume fade. This is a unique feature of this
system.
Tip: Turn the VOLUME up to release MUTE
and return to the prior volume setting.
-20 dB Audio DIM Function
The audio DIM function reduces the output
level by 20 dB. When DIM is toggled on, the
volume fades down by exactly 20 dB. When
DIM is toggled off, the volume fades back up
to the original level.
The volume bar graph will be displayed in
yellow when DIM is on.
Tip: Turn the VOLUME up to release DIM
and return to the prior volume setting.
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