User guide

Chapter 2: Mbox Pro Hardware Overview 7
Master Volume Knob
The Master Volume knob adjusts the output
level of the assigned Monitor output pair. The
Master Volume knob is assigned to an output
pair (1–2, 3–4, or 5–6) in the Control Panel. See
“Master Vol.” on page 32.
Dim/Mute Switch
The Dim/Mute switch affects the output volume
for control room outputs as assigned in the
Driver Control Panel setup (by default, Line out-
puts 1 and 2.) See “Control Room Assignment”
on page 32.
The switch has two functions:
 When pushed, Line outputs 1 and 2 (or the
currently assigned Control Room outputs) are
dimmed. When Dim is engaged, the switch LED
lights solid.
 When pushed and held in, Line outputs 1 and
2 (or the currently assigned Control Room out-
puts) are muted. When Mute is engaged, the
switch LED flashes.
Mono Switch
The Mono Button sums the control room out-
puts to a mono signal (delivering that identical
signal to both speakers) via the Driver Control
Panel or the Mbox Pro. When engaged, the
Mono LED lights.
Spkr (Speaker) Button
You can assign Monitor outputs pairs to the
Speaker button and cycle through the pairs as
configured in the Control Panel (see Chapter 5,
“Using the Driver Control Panel” and “Control
Room Assignment” on page 32). This is useful
for A/B-ing your mix between different studio
monitors.
When pressed and held, it sources Aux inputs
5–6, letting you can switch between monitoring
playback from your audio application and mon-
itoring an external source (such a CD player)
connected to Aux inputs 5–6.
Headphone Outputs
Use the A and B, front panel Headphone outputs
to connect stereo headphones with a 1/4-inch
stereo connector. Headphone output A mirrors
Monitor outputs 1–2 by default. Sources for the
Headphone outputs can be configured in the
Control Panel. See “Stereo Mix Section” on
page 34.
Headphone A and B Volume Knobs
The Headphone knobs adjust the output level of
their corresponding Headphone output (A or B).
Multi Button
The Multi button can be assigned to execute sev-
eral functions in Pro Tools, including
Track Create, Start/stop Record, Tap Tempo,
Toggle Marker Locations, and Save Session. For
detailed information, see Chapter 6, “Using the
Multi Button.”
Power Indicator LED
The Power LED indicates that the Mbox Pro is
receiving power from its power supply. Once the
light is on, audio can pass in or out of the sys-
tem. If the light is flashing, the power is not cor-
rect or clock is not locked.