Pro Tools | PRE Guide10
Pro Tools | PRE Back Panel
Pro Tools | PRE has the following back panel connectors:
Mic Inputs 1–8
These are balanced XLR jacks, with Pin 1 wired
ground, Pin 2 wired hot (or “+”), and Pin 3 wired
cold (or “–”).
Use these jacks for microphone connections or for
line level devices that support balanced XLR con-
nectors.
Line/Inst (Line Level/Instrument)
Inputs 1–8
These are balanced 1/4-inch TRS jacks, with Tip
wired hot (or “+”), Ring cold (“–”), and Sleeve
ground.
Unbalanced connections are supported with the
use of standard 1/4-inch mono phone plugs. If us-
ing line inputs with balanced line level devices, be
sure to use balanced to balanced cables to maxi-
mize performance.
DB-25 Outputs 1–8
This is a balanced DB-25 connector for line out-
puts 1–8. For pinouts, see Chapter 5, “Pinout Dia-
gram for the PRE DB-25 Connector.”
This connector can also output a fixed oscillator
signal on each channel. For more information, see
“OSC (Oscillator) Switch and LED” on page 6.
Send and Return Inserts 1–8
These are balanced 1/4-inch TRS Send and
1/4-inch TRS Return jacks, with Tip wired hot (or
“+”), Ring cold (“–”), and Sleeve ground. Insert
send levels are post output trim.
Use these jacks for inserting external devices such
as compressors or equalizers in the audio path be-
fore recording to disk. Sends can also be used as
line outputs; in this case, all front panel controls
will affect the signal, except Mute.
Return channels 1–8 can be bypassed from the
front panel, or through remote control.
Pro Tools | PRE back panel
Send and Return Inserts 1–8
Mic Inputs 1–8 Line/Inst Inputs 1–8
DB-25 Outputs 1–8
Output Trims 1–8
MIDI In/Out/Thru
Oscillator Output
Power supply
connector
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