Specifications
PRE Guide14
To connect line level and instrument level sources:
1 Press the Channel Select switch for the
Line/Inst Input you will be using.
2 Change the input source to Line or Inst by
pressing Source one or more times.
3 Plug a line level source (such as a synth, out-
put from your mixer, or a microphone or guitar
that has been amplified by an outboard preamp)
or a DI (direct instrument) source into a
Line/Inst Input on the front or back of PRE.
These inputs accept balanced/unbalanced TRS
connectors.
4 Repeat these steps for additional connections.
Using External Devices
PRE can make dedicated connections to external
analog devices (such as compressors and equal-
izers) before committing the signal to disk in
Pro Tools. You can send and return signals to
these devices, using PRE’s back panel Send and
Return jacks.
To connect an external analog device to your
system:
1 Connect the Send jack of one PRE channel to
an input of the external signal processor.
2 Connect the output of the external signal pro-
cessor to the Return jack of the same PRE
channel.
3 Press the Channel Select switch for the
Send/Return channel you will be using.
4 Press Insert.
Repeat these steps for additional connections.
Calibrating PRE and Other
Devices
Before you use PRE, you may want to calibrate
its output level (as well as the input and output
levels of other devices) to the level of your mix-
ing console.
The output trims are factory-calibrated so that
the clip point of the PRE output amplifier
matches the factory-set clip point of HD I/O and
192 I/O analog input. The PRE’s output level is
–6 dBu below its maximum output of +28 dBu
(+22 dBu). If you do not intend to use an HD I/O
or 192 I/O, you should turn the trims all the way
up (clockwise) to allow for maximum signal out-
put (+28 dBu) and maximum performance.
If using line inputs with balanced line level
devices, be sure to use balanced to balanced
cables to maximize performance.
Both the Send and Return jacks are balanced
1/4-inch jacks, with Tip wired hot (or “+”),
Ring cold (“–”), and Sleeve ground. Insert
send levels are post output trim.