Mono Line Inputs; Stereo Line Inputs; Channel Insert; Stereo Return - Mackie ProFX12 Owner's Manual

MIC MIC
5 5 5
6
1 2
LINE
HI-Z
7 BAL / 8 BAL / 8
UNBAL UNBAL
LINE/HI-Z IN 1 LINE IN 2
10 10 10
INSERT INSERT

8. MONO LINE INPUTS

power) with the mic preamps and may be driven by
balanced or unbalanced sources.
To connect balanced lines to these inputs, use a
To connect unbalanced lines to these inputs, use a
If using a stereo source, and the stereo
and hybrid channels are in use, utilize two
mono channels instead. Traditionally, an
odd-numbered channel receives the left signal. For
example, feed the ProFX mixer a stereo signal by
inserting the device's left output plug into the
channel 1 jack (panned fully left) and its right output
plug into the channel 2 jack (panned fully right).

9. STEREO LINE INPUTS

balanced or unbalanced sources. They may be used
with just about any professional or semi-pro
instrument, effect or tape player.
Tip-Ring-Sleeve (TRS) plug.
To connect unbalanced lines to these inputs, use a
If using just a mono source, plug it into the left input
(labeled mono) and the signal will appear (as if by
magic) equally on the left and right of the main mix.

10. CHANNEL INSERT

effects processors such as compressors, equalizers,
de-essers, or filters.
We've included inserts for just the mono channels.
If using this kind of processing on other channels,
simply patch through the processor before plugging
into the ProFX mixer.
14
ProFX8 and ProFX12
MIC MIC MIC
5 5
3 4 5/6
(MONO)
8
BAL / BAL /
L
UNBAL UNBAL
9
BAL /
LINE IN 3 LINE IN 4 LINE IN 5
UNBAL
R
10
INSERT INSERT LINE IN 6
17 18
MIC (UNBALANCED)
L
L
5
TAPE TAPE
IN
OUT
R R
7/8 9/10 11/12
(MONO) (MONO) (MONO)
L L
9 9 9
BAL / BAL / BAL /
LINE IN 7 LINE IN 9 LINE IN 11
UNBAL UNBAL UNBAL
R R
LINE IN 8 LINE IN 10 LINE IN 12
The insert point is after the gain control [19], level
set LED [20] and low cut switch [21], but before the
channel EQ [22-24] and fader [30]. The channel signal
may go out of the insert jack to an external device, be
processed (or whatever) and come back in on the same
insert jack. To do this requires a special insert cable
that must be wired thusly:
Tip = send (output to effects device)
Ring = return (input from effects device)
Sleeve = common ground
ring
tip
sleeve
This plug connects to one of the
mixer's Channel Insert jacks.
Insert jacks may be used as channel direct outputs;
post-gain, and pre-EQ. See the connector section on
page 28 (figure F) showing three ways to use insert
connections.

11. STEREO RETURN

This is where to connect the outputs of parallel
effects devices (or extra audio sources). The circuits
will handle stereo or mono, balanced or unbalanced
signals. They may be used with just about any pro or
semi-pro effects device or line-level source on the
market. The signals coming into these inputs may be
adjusted using the stereo return fader [44] before
passing onto the main mix bus (see page 23). Signals
coming in here may also be quickly muted with the
mute switch [43], and the OL LED [42] will illuminate
if the incoming signal is too high.
Stereo Device: If using a stereo parallel effects device
(two cords), use stereo return left and right.
Mono Device: If using an effects device with a mono
output (one cord), plug that into the stereo return left/
mono, and leave the right unplugged. The signal will be
sent to both sides, magically appearing in the center as
a mono signal.
(MONO)
12
BAL /
L L
UNBAL
11 14
BAL /
MON SEND
UNBAL
13
BAL /
R R
UNBAL
ST RETURN FX SEND MAIN OUT
SEND to processor
(TRS plug)
RETURN from processor
15
L
BAL /
FOOTSWITCH
UNBAL
16
R
PHONES
"tip"
"ring"