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Mackie 1220I 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
O
O
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
ALT 3/4
10
dB
30
20
10
40
50
5
5
U
60
O
O
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
ON
YX MIC PRE
 
TALKBACK
MAIN MIX
TALKBACK
PRE
POST
HI-Z
LINE
PREMIUM ANALOG MIXER 
w/ PERKINS EQ & FIREWIRE 
TAPE 
MAIN OUT
IN
OUT
L
R
BAL/UNBAL
BAL/UNBAL
ALT 3-4 OUT
BAL/UNBAL
CTRL - RM OUT
AUX
1-2
PHONES
DESTINATION
LEVEL
O
O
MAX
 SEND
PRE
POST
 SEND
PRE
POST
 SEND
EQ
MID
2.5kHz
HIGH
12kHz
PRE
POST
SEND
L
L
L
L
R
R
R
R
 SEND
INPUT
FW 1-2
LINE
(MONO)
(MONO)
(MONO)
(MONO)
R/4
L/3
L
R
L
R
POWER
MIC
1
2
75Hz
18dB/OCT
3
75Hz
18dB/OCT
4
ON
YX MIC PRE
 
PRE
POST
HI-Z
LINE
 SEND
ON
YX MIC PRE
 
PRE
POST
 SEND
ON
YX MIC PRE
 
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
12kHz
MID
2.5kHz
LOW
80Hz
HIGH
12kHz
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
L
R
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
O
O
MAX
O
O
+
15
O
O
+
15
O
O
+
10
O
O
+
10
O
O
MAX
O
O
MAX
O
O
U
+15
-15
U
+15
-15
LOW
80Hz
AUX
2
1
L
R
PAN
MAX
O
O
MAX
O
O
2
3
4
7-8
5-6
AUX
2
1
L
R
PAN
MAX
O
O
MAX
O
O
AUX
2
1
L
R
PAN
MAX
O
O
MAX
O
O
AUX
2
1
L
R
PAN
MAX
O
O
MAX
O
O
9-10
11-12
LINE IN 9-10
LINE IN 11-12
LINE IN 7-8
LINE 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
O
O
MAX
O
O
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
O
O
MAX
O
O
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
O
O
MAX
O
O
MID
FREQ
1
FIREWIRE
L
R
POWER
4
3
CHANNEL INSERT
BAL/UNBAL
1
AUX RETURN
2
2
1
1
( PRE-FADER / PRE EQ    TIP SEND / RING RETURN )
BAL/UNBAL
2
MAIN OUT
BALANCED
AUX SEND
L
R
L
R
MAIN OUTPUT
 LEVEL
MIC
+
4dB 
Aux Sends
Aux 1
Aux 2
Pre/Post
Aux Send Masters
Return to Aux 1
Aux Return
Masters