Break Switch; Tape Level; Stereo Graphic Eq; Main Mix/Mon - Mackie ProFX12 Owner's Manual

R R
ST RETURN

STEREO GRAPHIC EQ

U
36
15
10
+20
5
0
5
EQ
U
10
15
HI
12kHz
125 250 500
+15
U
37
MAIN MIX
MON
MID
2.5kHz
+15
U
LOW
FX PRESETS
80Hz
48
01 BRIGHT ROOM
02 WARM LOUNGE
+15
03 SMALL STAGE
04 WARM THEATER
AUX
U
05 WARM HALL
06 CONCERT HALL
49
07 PLATE REVERB
MON
08 CATHEDRAL
09 CHORUS
+15
10 CHORUS + REV
U
11 DOUBLER
12 TAPE SLAP
13 DELAY 1 (300ms)
FX
14 DELAY 2 (380ms)
52
15 DELAY 3 (480ms)
+15 16 REVERB + DLY (250ms)
PAN
U
51
OL
+15
R O O
FX MASTER
42 43
MUTE MUTE
OL
11/12 ST RTN
dB
10
5
U
5
44 45
10
20
30
40
50
60
O O

34. BREAK SWITCH

This important "take-a-break" switch quickly mutes
all the microphones and line-level inputs when the band
is between sets. This will prevent protestors or rogue
karaoke singers from storming the stage at the interval.
The monitor send [12] and FX send [13] are not
affected. Check this switch first if you are having trouble
with no sound in the system.
You can still play the stereo RCA tape inputs [17] in
the main stereo mix, and play audio coming in from your
computer via the USB inputs. For example, you could
play a soothing CD while the band is off stage.
22
ProFX8 and ProFX12
BAL /
R
UNBAL
FX SEND MAIN OUT
1K 2K 4K 8K
38
EQ IN
BYPASS
USB
U
39
+10
O O
INPUT LEVEL
PRESETS
40
MUTE
50
USB THRU
U
53 41
+15
O O MAX
O O
FX TO MON PHONES
MON
FX RTN
dB dB
10 10
5 5
U U
5 5
46
10 10
20 20
30 30
40 40
50 50
60 60
O O O O
PHONES

35. TAPE LEVEL

This knob controls the input level of signals entering
31
15
48V
the tape inputs. It is conveniently located close to the
10
break switch [34] so all channels may be quickly muted
PHANTOM
5
POWER
while bringing up the background music while the band
0
32
is taking a break.
5
POWER
10
MAIN
15
36. STEREO GRAPHIC EQ
METERS
0dB=0dBu
This 7-band graphic equalizer adjusts the main mix
OL
15 output. It affects the line-level outputs [3, 14], but not
10
the tape outputs [18], headphones [16], or the USB
6
3
output [4]. This EQ may be used for the monitor mix
33
0
instead of the main mix, if the main mix/mon switch
2
4
[37] is engaged. It may also be quickly bypassed using
7
the EQ in/bypass switch [38].
10
20
30
Each slider adjusts the level of its frequency band,
L R
with up to 15 dB of boost or cut, and no change in level
34
at the center (0 dB) position. The frequency bands are:
125, 250, 500, 1k, 2k, 4k, and 8kHz.
BREAK
(MUTES ALL CHANNELS)
The EQ section comes before the main fader [47]
U
35
and meters [33]. As with the channel EQ, just take it
easy. There is a large amount of adjustment, and if you
+20
O O
TAPE LEVEL
are not careful, you can upset the delicate balance of
MAIN
nature. Although it may not seem cool to actually turn
down controls, with EQ it is often your best option. Turn
down the offending frequency range, rather than boost
dB
the wanted range. Use it to reduce the level of some
10
frequency bands where feedback occurs.
5
U

37. MAIN MIX/MON

5
47
Use this switch to choose if the stereo graphic
10
EQ [36] is used for the stereo left and right main
mix or if it is used for the monitors. For example,
20
there may be times when the graphic EQ may be
30
used wisely in the monitor mix to reduce feedback
40
in the monitors from nearby microphones.
50
60
O O

38. EQ IN/BYPASS

Use this switch to quickly engage or disengage the
stereo graphic EQ. This may be used for quick checks
of EQ settings or to shorten the signal path if not using
the EQ.

39. USB INPUT LEVEL

This control adjusts the signal level of the two chan-
nels coming in from the computer, via the USB port,
relative to the mix of the other channels. Adjust it care-
fully to achieve the desired mix with the other channels.
The USB input from audio software such as Tracktion,
could be individual instrument tracks, a mix of tracks,
or processed tracks.