User Manual

Chapter 5: Mbox Hardware Overview 33
USB LED
The USB LED indicates that the Mbox is receiv-
ing power from its USB connection. Once the
USB light is on, audio can pass in or out of the
system.
The USB LED is a power LED, which will also in-
dicate when the unit is powered in stand-alone
mode. In this mode you can connect a USB cable
but that cable will be connected to a wall outlet
instead of a computer (similar to an iPod or
iPhone).
Dim Button and LED
The Dim Button reduces by 30 dB the output
volume from both the Line Outputs and the
Headphone Output. When engaged, the Dim
LED lights.
Guitar Tuner Function
When the Dim Button and the Mono Button are
pushed at the same time, the Guitar Tuner func-
tion is activated. The Dim and Mono LEDs will
flash between off and on to indicate tuner mode
is active. When a string is played on a guitar
plugged into an Instrument Input, the Input 1
Signal/Clip LED will be illuminated red if tuning
is too low, off when tuning is too high, and
green when tuning is correct. The Input 2 Sig-
nal/Clip LED will be illuminated red if tuning is
too high, off when tuning is too low, and green
when tuning is correct. The Tuner interface will
be displayed in the Software Control panel if the
Software Control Panel is open.
Mono Button
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. When engaged, the Mono
LED lights.
Checking Phase Relationships
The Mono switch can also be used for a quick
check of the phase relationship between
Source 1 and Source 2 inputs.
Monitor Level
The Monitor Level knob adjusts the output level
of the Monitor Output ports.