User guide

Chapter 4: Making Studio Connections 21
Connecting Inserts
Mbox Pro provides a total of four insert jacks
(Inserts 1–4) for inserting external processing
devices such as an EQ or a compressor between
the input channel’s onboard mic preamp and
the onboard analog to digital convertor.
To insert an external processor on an input:
1 Using a 1/4-inch insert cable (single TRS con-
nector to dual TS connectors), connect the sin-
gle TRS connector (the connector with two
rings) to one of the insert jacks on your
Mbox Pro.
2 Connect the dual TS connectors (the “Y” end
of the cable) to the external processor as follows:
• Connect the TS connector that corre-
sponds to the tip (send) on the TRS connec-
tor to the input of the processor.
– and –
• Connect the other TS connector that corre-
sponds to the ring (return) on the TRS con-
nector to the output of the processor.
Connecting Digital I/O
Mbox Pro provides digital inputs and outputs
for S/PDIF-format digital audio. S/PDIF digital
I/O can be used in combination with analog I/O,
and are independently routable.
Connecting Digital Devices
To connect Mbox Pro to an external digital device:
1 Using the included breakout cable, connect it
to the Word Clock, MIDI, and S/PDIF input on
the back panel of the Mbox Pro.
2 Using RCA (coaxial) cables, connect the
Mbox Pro S/PDIF In to the S/PDIF output of the
device.
3 Connect the Mbox Pro S/PDIF Out to the
S/PDIF input of the external device.
4 Be sure to read the next section for important
information.
Insert jacks for external processing on Mbox Pro
Insert cable
Inserts 1–4
Dual TS
connector
Single TRS
connector
Word Clock, MIDI, and S/PDIF input on Mbox Pro
Use 75 ohm RCA cables (the standard for
digital audio) as other cables (such as home
stereo cables) may have problems.
Multi-pin port for breakout cable input