User guide

Avid Mbox Pro User Guide18
3 If your microphone requires phantom power,
make sure the microphone is connected, then
press the Phantom Power switch (labeled 48V)
on the front of the Mbox Pro. This switch sends
48V to all four inputs. The 48V LED on the
front of the Mbox Pro will light when phantom
power is being supplied.
4 On the front of the Mbox Pro, turn the master
volume knob to the desired level.
5 On the front of the Mbox Pro, carefully turn the
Gain knob to the right to increase the input level
of your microphone signal.
6 If the incoming signal is too loud, press the
Push/Pull knob to the “out” position to engage
the –20 dB pad.
Connecting Instruments to
the Mbox Pro
Mbox Pro provides three input types (DI, Line,
and Aux In) for instruments.
DI Input (Front Panel) Use the front-panel DI
(“Direct Inject”) inputs for instruments such as
electric guitar, electric bass, or other instruments
that use pickups.
Line Inputs (Back Panel) Use the back-panel 1/4-
inch Line inputs for line-level devices, including
electronic audio sources such as mixers, samplers,
keyboards, and synthesizers.
Aux 5/6 (Back Panel) Use the back-panel RCA
jacks or the 1/8-inch stereo jack for line-level de-
vices such as a CD players or MP3 players.
Connecting Electric Guitar or Bass
To use a guitar with Mbox Pro:
1 On the front of the Mbox Pro, plug your guitar
or bass cable into one of the Mic/DI inputs.
2 On the front of the Mbox Pro, make sure the
Front/Rear switch for Mic/DI 1 is in the “out”
position.
3 On the front of the Mbox Pro, turn the master
volume knob to the desired level.
Phantom Power switch
Gain knob for Input 3 (Master volume knob shown)
Input 3 Pad
48V (Phantom Power)
Master volume knob
Gain knob
–20 dB Pad
Connecting guitar to the Mic/DI 1 connector