Mackie ProFX22 - Channel Strip Controls - Faders and USB; PFL Solo Switch; Channel Fader; USB Switch

16 ProFX16 and ProFX22
22. PFL SOLO Switch
When a channel's solo switch is engaged, any existing
selection is replaced by the solo signal, appearing at the
control room outputs [31], phones [33] and at the left
meter [40]. The audible solo levels are then controlled
by the control room knob [53]. The solo levels
appearing on the meters are not controlled by the
control room knob [53] - you would not want that,
anyway. What you do want to see is the actual channel
level on the meters regardless of how loud the control
room and phones output levels might be.
PFL means Pre-Fader Listen (post-EQ). With the PFL
Solo switch engaged, solo will not be affected by a
channel's mute switch [20] position.
Remember, PFL taps the channel signal before
the fader. If you have a channel's fader set
way below “U” (unity gain), solo will not know
that and will send a unity gain signal to the C-R outs
[31], phones output [33] and meter display [40], which
may raise some eyebrows.
23. CHANNEL FADER
This is the last control in a channel’s signal path, and
it adjusts the level of each channel onto the main mix.
The “U” mark indicates unity gain, meaning no increase
or decrease of signal level. All the way up provides an
additional 10 dB, should you need to boost a section of
a song. If you find that the overall level is too quiet or
too loud with the level near unity, check that the gain
control [9] is set correctly.
24. USB Switch
The USB switch on the last stereo channel provides
stereo playback of iTunes
®
, or a DAW via the USB
connection. Like any other input, this signal may also
be EQ'd, sent to an aux bus, or mixed in with the other
signals and assigned to subgroups or main outs. This
switch overrides the TRS inputs [6, 7].
Mono Channels Stereo Channels
Channels 1-8 on ProFX16
Channels 1-14 on ProFX22
Channels 9-16 on ProFX16
Channels 15-22 on ProFX22
MUTE MUTE MUTE MUTE MUTE
MIC MIC MIC
GAINGAIN
+20-20
GAIN
(MONO)
L
R
(MONO)
BAL / UNBAL
BAL / UNBAL
BAL / UNBAL
BAL / UNBAL
BAL / UNBAL
BAL / UNBALBAL / UNBALBAL / UNBAL
L
R
(MONO)
L
R
LINE IN XX
LINE IN XX
LINE IN XX
LINE IN XX
LINE IN XX
LINE IN XX
XX / XX XX / XX XX / XX
LINE INLINE IN
XX XX
U
+50
M
I
C
G
A
I
N
U
LOW CUT
SOURCE
LINE
USB
XX XX XX / XX XX / XX XX / XX
1
2
U
GAIN
M
I
C
G
A
I
N
U
+50
-20dB
+30dB
AUX
LINE IN
OL
RL
PAN
dB
30
20
10
10
OO
40
50
5
5
U
60
PFL
SOLO
L-R
1-2
3-4
80Hz
LOW
MID
FREQ
600
1.5k150
8k100
EQ
12kHz
HI
MON
1
MON
2
U
+15
OO
U
+15
OO
U
+15
OO
-15
U
+15
-15
U
+15
-15
U
+15
LOW CUT
U
GAIN
M
I
C
G
A
I
N
U
+50
-20dB
+30dB
AUX
OL
RL
PAN
dB
30
20
10
10
OO
40
50
5
5
U
60
PFL
SOLO
L-R
1-2
3-4
80Hz
LOW
MID
FREQ
600
1.5k150
8k100
EQ
12kHz
HI
MON
1
MON
2
U
+15
OO
U
+15
OO
U
+15
OO
-15
U
+15
-15
U
+15
-15
U
+15
LOW CUT
OL OL OL
dB
30
20
10
10
OO
40
50
5
5
U
60
PFL
SOLO
L-R
1-2
3-4
dB
30
20
10
10
OO
40
50
5
5
U
60
PFL
SOLO
L-R
1-2
3-4
dB
30
20
10
10
OO
40
50
5
5
U
60
PFL
SOLO
L-R
1-2
3-4
EQ EQ EQ
AUX
RL
PAN
MON
1
MON
2
U
+15
OO
U
+15
OO
U
+15
OO
AUX
RL
PAN
MON
1
MON
2
U
+15
OO
U
+15
OO
U
+15
OO
AUX
RL
PAN
MON
1
MON
2
U
+15
OO
U
+15
OO
U
+15
OO
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
INSERT
OFF MAX
COMP
12kHz
HI
80Hz
LOW
MID
2.5kHz
12kHz
HI
80Hz
LOW
MID
2.5kHz
12kHz
HI
80Hz
LOW
MID
2.5kHz
FX SEND
FOOTSWITCH
MON SEND
+20-20
U
100Hz 100Hz 100Hz
FX FX FX FX FX
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