User Manual

Mbox User Guide32
Soft-Limit Buttons
These buttons activate the Soft-Limit function,
applying a smooth, overdriven tape-type limit-
ing to strong input signals.
Front/Rear Source Selectors
These buttons select either the front panel In-
strument Inputs (TS) or rear panel Mic/Line In-
puts (XLR/TRS combo) for each channel. When
the button is set to the Out position, the front
panel Instrument Inputs will be active. When
the button is set to the In position, the rear
panel Mic/Line Inputs will be active.
Multi Button
The Multi Button can be assigned to execute sev-
eral functions in Pro Tools, including Add Track,
Start/Stop Record, Tap Tempo, Toggle Marker
Locations, and Save Session.
48V Switch and LED
Phantom power is activated by the switch la-
beled 48V on the front panel of Mbox. The LED,
when lit, indicates that 48V phantom power is
active on the XLR Mic inputs. These inputs pro-
vide phantom power for microphones that re-
quire it to operate.
About Phantom Power
Dynamic microphones (such as a Shure SM57)
do not require phantom power to operate, but
are not harmed by it. Most condenser micro-
phones (like an M-Audio Solaris) do require
phantom power to operate.
If you are not sure about the phantom power re-
quirements for your microphone, consult your
microphone’s documentation or contact the
manufacturer.
Headphone Volume
The Headphone Volume knob adjusts the out-
put level of the Headphone port, which outputs
the signal that is routed to Outputs 1–2 in
Pro Tools LE, and mirrors the Line Outputs.
Front Panel Headphone Output
Use the Headphone Output to connect stereo
headphones with a 1/4-inch stereo connector.
Although phantom power can be used
safely with most microphones, it is possible
to damage some ribbon microphones with
it. Always turn off phantom power and wait
at least ten seconds before connecting or dis-
connecting a ribbon microphone.
When using phantom power, the Mbox
maximum current per microphone is 4 mA.