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

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

8. MONO LINE INPUTS

U +50 U +50
+30dB +30dB
-20dB -20dB
GAIN GAIN
LOW CUT LOW CUT
100 Hz 100 Hz
These 1/4" jacks share circuitry (but not phantom
EQ EQ
U U
power) with the mic preamps and may be driven by
HI HI
12kHz 12kHz
balanced or unbalanced sources.
-15 +15 -15 +15
U U
MID MID
To connect balanced lines to these inputs, use a
2.5kHz 2.5kHz
-15 +15 -15 +15
U U
1⁄4" Tip-Ring-Sleeve (TRS) plug.
LOW LOW
80Hz 80Hz
-15 +15 -15 +15
To connect unbalanced lines to these inputs, use a
AUX AUX
U U
1⁄4" mono (TS) phone plug or instrument cable.
MON MON
+15 +15
O O O O
U U
If using a stereo source, and the stereo
FX FX
and hybrid channels are in use, utilize two
+15 +15
O O O O
PAN PAN
mono channels instead. Traditionally, an
odd-numbered channel receives the left signal. For
L R L R
example, feed the ProFX mixer a stereo signal by
MUTE MUTE
inserting the device's left output plug into the
OL OL
1 2
channel 1 jack (panned fully left) and its right output
dB dB
10 10
plug into the channel 2 jack (panned fully right).
5 5
U U

9. STEREO LINE INPUTS

5 5
10 10
These 1/4" jacks may be driven by stereo or mono,
20 20
30 30
balanced or unbalanced sources. They may be used
40 40
with just about any professional or semi-pro
50 50
60 60
O O O O
instrument, effect or tape player.
To connect balanced lines to these inputs, use a 1⁄4"
Tip-Ring-Sleeve (TRS) plug.
To connect unbalanced lines to these inputs, use a
1⁄4" mono (TS) phone plug or instrument cable.
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

These unbalanced 1/4" jacks are for connecting serial
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 5
3 4
BAL / BAL /
8
UNBAL UNBAL
9
LINE IN 3 LINE IN 4 LINE IN 5
10
INSERT INSERT LINE IN 6
U U
LEVEL LEVEL
SET SET
U +50 U +50
U +50
+30dB +30dB
-20dB -20dB
GAIN GAIN GAIN
LOW CUT LOW CUT LOW CUT
100 Hz 100 Hz 100 Hz
EQ EQ
U U U
HI HI
12kHz 12kHz
-15 +15 -15 +15 -15 +15
U U U
MID MID
2.5kHz 2.5kHz
-15 +15 -15 +15 -15 +15
U U U
LOW LOW
80Hz 80Hz
-15 +15 -15 +15 -15 +15
AUX AUX
U U U
MON MON
+15 +15 +15
O O O O O O
U U U
FX FX
+15 +15 +15
O O O O O O
PAN PAN
L R L R L R
MUTE MUTE MUTE
OL OL OL
3 4
dB dB dB
10 10 10
5 5 5
U U U
5 5 5
10 10 10
20 20 20
30 30 30
40 40 40
50 50 50
60 60 60
O O O O O O
17
MIC (UNBALANCED)
L
5
TAPE
IN
R
5/6 7/8 9/10
(MONO) (MONO) (MONO)
L L L
9 9 9
BAL / BAL / BAL /
LINE IN 7 LINE IN 9 LINE IN 11
UNBAL UNBAL UNBAL
R R R
LINE IN 8 LINE IN 10 LINE IN 12
U
LEVEL LEVEL
SET
SET
The insert point is after the gain control [19], level
-20 +20 -20
U +50
GAIN GAIN
set LED [20] and low cut switch [21], but before the
LOW CUT
100 Hz
channel EQ [22-24] and fader [30]. The channel signal
EQ EQ EQ
U U
HI HI HI
may go out of the insert jack to an external device, be
12kHz 12kHz 12kHz
-15 +15 -15 +15 -15
U U
processed (or whatever) and come back in on the same
MID MID MID
insert jack. To do this requires a special insert cable
2.5kHz 2.5kHz 2.5kHz
-15 +15 -15 +15 -15
U U
that must be wired thusly:
LOW LOW LOW
80Hz 80Hz 80Hz
-15 +15 -15 +15 -15
Tip = send (output to effects device)
AUX AUX AUX
U U
MON MON MON
Ring = return (input from effects device)
+15 +15
O O O O O O
U U
Sleeve = common ground
FX FX FX
+15 +15
O O O O O O
PAN PAN PAN
ring
tip
L R L R
MUTE MUTE
This plug connects to one of the
OL OL OL
mixer's Channel Insert jacks.
5/6 7/8 9/10
dB dB dB
10 10 10
Insert jacks may be used as channel direct outputs;
5 5 5
U U U
post-gain, and pre-EQ. See the connector section on
5 5 5
page 28 (figure F) showing three ways to use insert
10 10 10
connections.
20 20 20
30 30 30

11. STEREO RETURN

40 40 40
50 50 50
60 60 60
O O O O O O
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.
18
L
TAPE
OUT
R
11/12
(MONO) (MONO)
12
BAL /
L L
UNBAL
11
BAL / BAL /
MON SEND
UNBAL UNBAL
13
BAL /
R R
UNBAL
ST RETURN FX SEND
STEREO GRAPHIC EQ
U
15
10
+20
5
GAIN
0
5
EQ
U 10
15
HI
12kHz
125 250 500 1K 2K
+15
U
MAIN MIX
MON
MID
2.5kHz
+15
U
LOW
FX PRESETS
80Hz
01 BRIGHT ROOM
02 WARM LOUNGE
+15
03 SMALL STAGE
04 WARM THEATER
AUX
U
05 WARM HALL
06 CONCERT HALL
07 PLATE REVERB
MON
08 CATHEDRAL
09 CHORUS
+15
10 CHORUS + REV
PRESETS
U
11 DOUBLER
12 TAPE SLAP
13 DELAY 1 (300ms) MUTE
FX
14 DELAY 2 (380ms)
15 DELAY 3 (480ms)
+15 16 REVERB + DLY (250ms)
PAN
U U
SEND to processor
OL
(TRS plug)
sleeve
+15 +15
O O
L R O O
FX MASTER FX TO MON
MUTE MUTE
OL
RETURN from processor
11/12 ST RTN FX RTN
dB dB
10 10
5 5
U U
5 5
10 10
20 20
30 30
40 40
50 50
60 60
O O O O
15
L
14
BAL /
FOOTSWITCH
UNBAL
16
R
MAIN OUT PHONES
15
48V
10
PHANTOM
5
POWER
0
5
POWER
10
MAIN
15
METERS
4K 8K 0dB=0dBu
OL
EQ IN
15
BYPASS
10
6
3
USB
0
2
4
U
7
10
20
30
+10
O O
L R
INPUT LEVEL
BREAK
USB THRU
(MUTES ALL CHANNELS)
U
"tip"
+20
MAX
O O O O
PHONES TAPE LEVEL
MON MAIN
"ring"
dB dB
10 10
5 5
U U
5 5
10 10
20 20
30 30
40 40
50 50
60 60
O O O O