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

STEREO GRAPHIC EQ

36
15
10
5
0
5
10
15
125 250 500 1K
37
MAIN MIX
MON
FX PRESETS
48
01 BRIGHT ROOM
02 WARM LOUNGE
03 SMALL STAGE
04 WARM THEATER
05 WARM HALL
06 CONCERT HALL
49
07 PLATE REVERB
08 CATHEDRAL
09 CHORUS
10 CHORUS + REV
PRESETS
11 DOUBLER
12 TAPE SLAP
13 DELAY 1 (300ms) MUTE
14 DELAY 2 (380ms)
52
15 DELAY 3 (480ms)
16 REVERB + DLY (250ms)
U
51 53
OL
+15
O O
O O
FX MASTER
FX TO MON
42 43
MUTE
OL
ST RTN FX RTN
dB dB
10 10
5 5
U U
5 5
44 45
10 10
20 20
30 30
40 40
50 50
60 60
O O 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
31
15
10
PHANTOM
5
0
32
5
10
MAIN
15
METERS
2K 4K 8K
0dB=0dBu
38
EQ IN
BYPASS
33
USB
U
39
+10
O O
L
INPUT LEVEL
34
40
50
USB THRU
(MUTES ALL CHANNELS)
U
41 35
+15
MAX
O O O O
PHONES

TAPE LEVEL

MON MAIN
dB dB
10 10
5 5
U U
5 5
46 47
10 10
20 20
30 30
40 40
50 50
60 60
O O O O
35. TAPE LEVEL
This knob controls the input level of signals entering
48V
the tape inputs. It is conveniently located close to the
break switch [34] so all channels may be quickly muted
POWER
while bringing up the background music while the band
is taking a break.
POWER
36. STEREO GRAPHIC EQ
This 7-band graphic equalizer adjusts the main mix
OL
15
output. It affects the line-level outputs [3, 14], but not
10
6
3
output [4]. This EQ may be used for the monitor mix
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
10 the EQ in/bypass switch [38].
20
30
Each slider adjusts the level of its frequency band,
R
at the center (0 dB) position. The frequency bands are:
BREAK
U The EQ section comes before the main fader [47]
and meters [33]. As with the channel EQ, just take it
easy. There is a large amount of adjustment, and if you
+20
are not careful, you can upset the delicate balance of
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
the wanted range. Use it to reduce the level of some
frequency bands where feedback occurs.

37. MAIN MIX/MON

Use this switch to choose if the stereo graphic
mix or if it is used for the monitors. For example,
there may be times when the graphic EQ may be
used wisely in the monitor mix to reduce feedback
in the monitors from nearby microphones.

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.