Connect audio inputs and outputs, Mic/guitar inputs with preamps – MOTU 828x 28x30 Audio Interface with ThunderTechnology User Manual
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I N S T A L L I N G T H E 8 2 8 X H A R D W A R E
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CONNECT AUDIO INPUTS AND OUTPUTS
The 828x audio interface has the following audio
input and output connectors:
■
8 balanced, +4 dB quarter-inch analog outputs
■
8 balanced +4 dB quarter-inch analog inputs
■
2 mic/guitar combo jack inputs with preamps
■
2 quarter-inch sends for the mic/guitar inputs
■
2 XLR main outs
■
2 pairs of optical in/out banks switchable
between ADAT (“Lightpipe”) or optical S/PDIF
(TOSLink)
■
1 pair of RCA S/PDIF in and out
Here are a few things you should keep in mind as
you are making these connections to other devices.
Mic/guitar inputs with preamps
Connect a microphone, guitar, instrument or other
analog input to the front panel XLR/quarter-inch
combo jack with either a standard mic cable or a
balanced cable with a quarter-inch plug.
Figure 4-1: Mic/guitar inputs.
☛
Do not connect a +4 (line level) XLR cable to
the front-panel inputs (because of the preamps).
Use a rear-panel quarter-inch input instead.
Phantom power
If you are connecting a condenser microphone or
another device that requires phantom power,
engage the corresponding front-panel phantom
power switch.
Trim
Both the low-impedance XLR mic input and the
high-impedance quarter-inch guitar input are
equipped with 53 dB of digitally controlled analog
trim. Use the detented trim knobs to adjust the
input level as needed for each input. The LCD
provides visual feedback as you turn the trim knob.
Figure 4-3: The LCD gives you feedback as you turn the TRIM knobs for
the two mic/guitar inputs.
The 828x’s input trims are digitally controlled, so
they allow you to make fine-tuned adjustments in
approximately 1dB increments. You can also adjust
trim in the MOTU CueMix FX software. See “Input
trim” on page 75.
-20 dB pad
Each mic input (XLR jack) is equipped with a
-20 dB pad switch, to accommodate input signals
that could overdrive the input.
☛
The pad is not available for the TRS jack.
Figure 4-2: 828x front panel