Specifications

Chapter 4: Mbox Hardware and Connections 31
Checking Phase Relationships
The Mono switch can also be used for a quick
check of the phase relationship between
Channel 1 and Channel 2 inputs.
When the two input signals are out of phase,
pressing the Mono switch will result in a sudden
“hollow” sound that is the result of phase can-
cellation. This quick test with the Mono switch
can help to avoid phase problems later when
mixing these tracks. Frequent checking of phase
relationships with the Mono switch can also as-
sist you in finding the optimal microphone
placement.
Headphone Gain
The headphone gain control adjusts the output
level of the front and back Headphone ports,
which output the signal that is routed to Out-
puts 1–2 in Pro Tools LE, and mirrors the Line
Outputs.
Front Panel Headphone Output
Use the front panel Headphone port to connect
stereo headphones with a 1/8-inch stereo mini
connector.
The front panel 1/8-inch Headphone port is dis-
abled when a 1/4-inch stereo connector is in-
serted into the back panel Headphone port.
Mbox Back Panel Features
The Mbox back panel has the following features:
Back Panel Headphone Output
Use this Headphone Output to connect stereo
headphones with a 1/4-inch stereo connector.
When a 1/4-inch stereo connector is inserted
into the back panel Headphone port, the front
panel 1/8-inch Headphone port is disabled.
Figure 4. Mbox back panel
back panel
48V
USB port
S/PDIF
Line
Source 1
Inserts
Source 2
digital I/O
Headphones
output
outputs
(analog
input 2)
(analog
input 1)