Mackie 1220i Music Mixer User Manual


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10 Onyx 1220i
Aux 1 and Aux 2
AUX SEND 1 and 2
The 1/4" TRS aux sends on the rear panel allow you
to send balanced or unbalanced line-level outputs to
external effects devices or stage monitors, independent
of the main mix.
Aux send 1 and aux send 2 are independent of each
other, so you can set up two separate aux mixes. The
aux 1 send output signal is the sum of all the channels
whose aux 1 send control is set to more than minimum.
The aux 2 send is the sum of all the channels whose aux
2 send control is set to more than minimum. The overall
aux output level can be adjusted with the aux send
master controls.
AUX SEND 1-2 and FIREWIRE
The aux sends are always available as FireWire signals
13 and 14 to send to a computer. For example, you can
use your computer with audio production software and
effects plugins, as an effects host. This substitutes
wonderfully for an outboard hardware effects processor.
See page 16 for an example of setting up a software
effects processor using the aux sends and FireWire.
Performance will vary based on system hardware.
PRE or POST
The aux sends can either be pre channel fader or post
channel fader, depending on the position of the pre/post
switches in the aux master section.
For stage monitor work, use PRE, so the stage
monitors do not increase in volume when the channel
fader is adjusted. This allows you to set up the
monitor mix and levels just right, and not have it change
every time a channel level is adjusted. Stage monitors
can either be passive speakers powered by an external
amplifi er, or powered speakers with their own amplifi er.
For external processors, use POST. In this way, the
feed to external processors will vary in level if the
channel fader is adjusted. For example, the level of any
returned effect (like an echo) will also change if the
channel level is changed, keeping them in the same
ratio (wet/dry).
Modifi cation: Pre-EQ Aux Sends
The pre-fader aux sends are post-EQ, so they are
affected by the channel EQ controls. The circuit boards
can be modifi ed so the pre-fader aux sends are pre-EQ
instead of post-EQ. For example, your stage monitors
will not be affected by any channel EQ adjustments.
This modifi cation can be done by an authorized service
center. Contact our technical support chaps for details.
AUX RETURN 1 and 2
These 1/4" TRS stereo input connectors allow you to
add the stereo processed output from external effects
processors or other devices to the main mix. Adjust the
level of the incoming signals with the aux return master
controls.
Alternatively, you can use these inputs to add any
stereo line-level signals to your main mix, so it could be
another line-level source, not just an effects
processor. If you are connecting a mono source, use the
left (mono) aux return input, and the mono signals will
appear on both sides of the main mix.
RETURN to AUX 1
The signals going into aux return 2 can also be added
to aux send 1 by engaging the return to aux 1 switch.
For example, you could add the effects returned from
an external effects processor fed by aux send 2, to your
stage monitors fed by aux 1.
Aux Returns
dB
30
20
10
40
50
5
5
U
60
10
OO
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
OO
ALT 3/4
OL
-
20
OL
-
20
OL
-
20
OL
-
20
OL
-
20
OL
-
20
OL
-
20
OL
-
20
SOLO SOLO SOLO SOLO SOLO SOLO SOLO SOLO
MUTE MUTE MUTE MUTE MUTE MUTE MUTE MUTE
48V 48V 48V 48V
U
+15
-15
U
+15
-15
O
N
Y
X
M
I
C
P
R
E
TALKBACK
MAIN MIXTALKBACK
PRE
POST
HI
-
Z
LINE
PREMIUM ANALOG MIXER
w/ PERKINS EQ & FIREWIRE
TAPE
MAIN OUT
IN
OUT
L
R
BAL/UNBALBAL/UNBAL
ALT 3
-
4 OUT
BAL/UNBAL
CTRL - RM OUT
AUX
1-2
PHONES
DESTINATION
LEVEL
OO
MAX
SEND
PRE
POST
SEND
PRE
POST
SEND
EQ
MID
2.5kHz
HIGH
12k Hz
PRE
POST
SEND
LLL
L
RRR
R
SEND INPUT
FW 1-2
LINE
(MONO)(MONO)
(MONO)
(MONO)
R/4L/3
LRLR
POWER
MIC
12
75Hz
18dB/OCT
3
75Hz
18dB/OCT
4
O
N
Y
X
M
I
C
P
R
E
PRE
POST
HI
-
Z
LINE
SEND
O
N
Y
X
M
I
C
P
R
E
PRE
POST
SEND
O
N
Y
X
M
I
C
P
R
E
GAIN GAIN GAIN GAIN
+40dB
U
-20dB
U
20
30
40
60
+40dB
U
-20dB
U
20
30
40
60
+40dB
U
-20dB
U
20
30
40
60
+40dB
U
-20dB
U
20
30
40
60
U
+15
-15
U
+15
-15
U
+15
-15
U
+15
-15
EQ
MID
2.5kHz
LOW
80Hz
HIGH
12kHz
EQ
MID
2.5kHz
LOW
80Hz
HIGH
12k Hz
MID
2.5kHz
LOW
80Hz
HIGH
12k Hz
PRE
POST
SEND
1k
100 8k
HIGH
12kHz
U
+15
-15
LOW
80Hz
EQ
AUX
2
1
L
R
PAN
1
LINE
2
LINE
4
LINE
3
LINE
BAL/UNBAL BAL/UNBAL BAL/UNBAL
BAL/UNBAL
BAL/UNBAL BAL/UNBAL BAL/UNBAL BAL/UNBAL
GAIN GAIN GAIN GAIN
+20dB-20dB
U
+20dB-20dB
U
U
+15
-15
U
+15
-15
U
+15
-15
+20dB-20dB
U
U
+15
-15
U
+15
-15
U
+15
-15
+20dB-20dB
U
AUX MASTER
2
1
SEND
RETURN
2
1
CTRL ROOM/PHONES
SOURCE
PHONES
CONTROL
ROOM
RUDE
SOLO
20
15
10
6
3
0
2
4
7
10
20
30
LR
0dB=0dBu
LEVEL
SET
CLIP
PRE
POST
PRE
POST
RTN TO
AUX1
MAIN MIX
ALT 3
-
4
TAPE
FW 1-2
ASSIGN TO
MAIN MIX
MAX
OO
MAX
OO
+15
OO
+15
OO
+10
OO
+10
OO
MAX
OO
MAX
OO
U
+15
-15
U
+15
-15
LOW
80Hz
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
234 7-85-6
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
9-10 11-12
LINE IN 9-10 LINE IN 11-12LINE IN 7-8LINE IN 5-6
MID
FREQ
U
+15
-15
U
+15
-15
1k
100 8k
HIGH
12kHz
U
+15
-15
LOW
80Hz
EQ
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
MID
FREQ
U
+15
-15
U
+15
-15
1k
100 8k
HIGH
12kHz
U
+15
-15
LOW
80Hz
EQ
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
MID
FREQ
U
+15
-15
U
+15
-15
1k
100 8k
HIGH
12kHz
U
+15
-15
LOW
80Hz
EQ
AUX
2
1
L
R
PAN
MAX
OO
MAX
OO
MID
FREQ
1
FIREWIRE
LR
POWER
43
CHANNEL INSERT
BAL/UNBAL
1
AUX RETURN
2
21
1
( PRE-FADER / PRE EQ TIP SEND / RING RETURN )
BAL/UNBAL
2
MAIN OUT
BALANCED
AUX SEND
LRLR
MAIN OUTPUT
LEVEL
MIC
+4dB
Aux Sends
Aux 1
Aux 2
Pre/Post
Aux Send Masters
Return to Aux 1
Aux Return
Masters
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