Lexicon MPX 550 - Manual (Page 28)

Getting Started
Lexicon
1-12
SETTING AUDIO LEVELS
Note:
As with all audio products, it is good practice to first
power on all outboard equipment, then the mixer,
then the speakers.
INPUT
1. Load Program 1.
2. Set the Mix parameter to Dry (Edit Page 1, EDIT
knob 4).
3. Using high-level program material, begin with a low
input level and advance it slowly.
4. When audible distortion is reached or when the
display clip indicators light and remain lit, lower the
input level until the clip meters appear only on the
highest peaks.
The Input Trim knob allows the unit to be driven by
an input level within a range of +8 to +20dBu. The
minimum setting (fully counterclockwise) should be
optimal for +4dBu (balanced) inputs. The maximum
setting (fully clockwise) should be optimal for
-10dBV (unbalanced) inputs.
OUTPUT
1. Press the front panel System button to activate
System Mode. Output Level, the first System Mode
parameter, will be displayed.
2. Turn EDIT knob 3 to set the Output Level parameter.
Unity gain for a +4dBu input device should be -12dB.
3. Press the System button again to deactivate System
Mode.