Allen & Heath ZED-420 Bedienungsanleitung

Allen & Heath Mischpult ZED-420

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USER GUIDE
Publication AP7028 Issue 2
Allen & Heath 2 ZED-4 BUS User Guide
Allen & Heath 3 ZED-4 BUS User Guide
ZED products comply with the European Electromagnetic Compatibility directive 2014/30/EU and the Eu-
ropean Low Voltage directive 2014/35/EU.
Any changes or modifications to the product not approved by Allen & Heath could void the compliance of the
product and therefore the user s authority to operate it.’
ALLEN HEATH
&
Limited One Year Manufacturer s Warranty’
Allen & Heath warrants the Allen &Heath branded hardware product and accessories contained in the original -
packaging ("Allen & Heath Product”) against defects in materials and workmanship when used in accordance with
Allen & Heath's user manuals, technical specifications and other Allen & Heath product published guidelines for a
period of ONE (1) YEAR from the date of original purchase by the end user purchaser ("-Warranty Period").
This warranty does not apply to any non Allen & Heath branded hardware products or any software, even if pack--
aged or sold with Allen & Heath hardware.
Please refer to the licensing agreement accompanying the software for details of your rights with respect to the use
of software/firmware EULA(“ ”).
Details of the EULA, warranty policy and other useful information can be found on the Allen & Heath website:
www.allen heath.com/legal-.
Repair or replacement under the terms of the warranty does not provide right to extension or renewal of the warran-
ty period. Repair or direct replacement of the product under the terms of this warranty may be fulfilled with func-
tionally equivalent service exchange units.
This warranty is not transferable. This warranty will be the purchaser s sole and exclusive remedy and neither Al-’
len & Heath nor its approved service centres shall be liable for any incidental or consequential damages or breach
of any express or implied warranty of this product.
Conditions Of Warranty
The equipment has not been subject to misuse either intended or accidental, neglect, or alteration other than as de-
scribed in the User Guide or Service Manual, or approved by Allen & Heath. The warranty does not cover fader
wear and tear.
Any necessary adjustment, alteration or repair has been carried out by an authorised Allen & Heath distributor or
agent.
The defective unit is to be returned carriage prepaid to the place of purchase, an authorised Allen & Heath distribu-
tor or agent with proof of purchase. Please discuss this with the distributor or the agent before shipping. Units re-
turned should be packed in the original carton to avoid transit damage.
DISCLAIMER: Allen & Heath shall not be liable for the loss of any saved/stored data in products that are either
repaired or replaced.
Check with your Allen & Heath distributor or agent for any additional warranty information which may apply. If
further assistance is required please contact Allen & Heath Ltd.
Register your product online at www.allen heath.com/register-.
Copyright © 2016 Allen & Heath. All rights reserved.
Allen & Heath 4 ZED-4 BUS User Guide
PACKED ITEMS
Check that you have received the following:
Mains Lead
Check that the correct
mains plug is fitted.
ZED-420, ZED428 or ZED-436 MIXER
Type A-B USB Lead
To connect the ZED to
your computer.
MIC
INSERT
LINE
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
1
DIR OUT
48V
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
2
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
3
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM 35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
4
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
5
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
6
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
7
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
8
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
9
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
10
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
11
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
12
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
13
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
14
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
15
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM 35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
16
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
25-26
-15 +15
HF
12k
-15
HM
+15
2k5
-15
LM
+15
250Hz
-15
LF
+15
80Hz
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
EQ IN
10
-30
-20
-5
0
5
-10
ST1
LEV
OO
10
-30
-20
-5
0
5
-10
OO
To LR
To CH
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
LEVEN
R
=
MUTE
PFL
PK !
SIG
10
OO
30
20
ST1IN
R
ST2
L/M
R
10
-30
-20
-5
0
5
-10
ST3
LEV
OO
To LR
To CH
PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL
ST3
L
R
ST4
L/M
R
STEREO INPUTS
ST2
LEV
IN
IN IN
-15 +15
HF
12k
-15
HM
+15
2k5
-15
LM
+15
250Hz
-15
LF
+15
80Hz
EQ IN
10
-30
-20
-5
0
5
-10
OO
ST4
LEV
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
LEVEN
R
=
MUTE
PFL
PK !
SIG
0
10
OO
30
20
27-28
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
17
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
1
OO
M
+ 6
MIC
INSERT
LINE
DIR OUT
48V
17
17
17
17
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
OO
M
+ 6
OO
LEVEL
+ 6
AFL
OO
LEVEL
+ 6
AFL
AUX AUX AUX AUX AUX AUX1 2 3 4 5 6
GRP GRP GRP GRP1 2 3 4
INSERT INSERT INSERT INSERT1 2 3 4
USB
SENDRETURN
AUX OUT
GROUP OUT
MTX MTX
1 2
MATRIX
OUT
L
L
R
L
R
2TRK IN
2TRK OUT
INSERTL
INSERTR
INSERTM
L
R
MAIN OUT
M
PHONES
MIN MAX
MIN MAX
M
LR
+16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
+16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
PFL/AFL ACTIVE
Talk to LRM
Talk to AUX 1-4
POWER
MTX
1-2
AUX
1-2
AUX
5-6
LR
pre- fade
All up =LR post
OO + 6
PLAYBACK
To LR
ALLEN&HEATH
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
L-R
M
PAN
L R
=PAN
L R
=PAN
L R
=PAN
L R
=
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE MUTE MUTE
AUX1
AFL
AUX2
AFL
AUX3
AFL
AUX4
AFL
AUX5
AFL
AUX6
AFL
GRP L R M
L-R
M
L-R
M
L-R
M
00
1 2 3 4
USB
2TRK
PLAYBACK SOURCE
LEVEL
PLAYBACK
LEVEL
TB
LEVEL
PHONES
PFL
USB SEND SOURCE
ST3 INPUT SOURCE
USB
ST3 IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
18
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
18
18
18
18
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
19
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
19
19
19
19
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
20
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM 35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
20
20
20
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
21
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
21
21
21
21
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
22
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
22
22
22
22
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
23
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
23
23
23
23
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
24
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
24
24
24
24
IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN
L R M
MATRIX 2MATRIX
1GRP GRP GRP234
M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
M
L-R
1-2
3-4
M
L-R
1-2
3-4
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
PFL
Allen & Heath 5 ZED-4 BUS User Guide
SAFETY INSTRUCTIONS
WARNINGS - Read the following before proceeding :
ATTENTION: RISQUE DE CHOC ELECTRIQUE – NE PAS OUVRIR
Allen & Heath 7 ZED-4 BUS User Guide
CONTENTS
Thank you for purchasing your Allen & Heath ZED mixer. To ensure that
you get the maximum benefit from the unit please spare a few minutes
familiarizing yourself with the controls and setup procedures outlined in
this user guide. For further information please refer to the additional
information available on our web site, or contact our technical support
team.
http://www.allen-heath.com
http://www.allen-heath.com/zed
http://www.myspace.com/thezedspace
Warranty ............................................. 3
Packed Items ....................................... 4
Safety Instructions ............................. 5
Contents ............................................. 7
Panel Drawings ................................... 8
Introduction to ZED ......................... 11
Specifications ...................................... 12
Dimensions ......................................... 13
Block Diagram .................................... 14
Mono Input Channel ......................... 15
Stereo Input Channel ........................ 19
Matrix Outputs & Aux Masters ...... 22
Group Masters ................................... 23
L R & M Masters & Headphones .... 24
Main Meters and Talkback ................ 25
USB Selection and Playback ............. 26
USB Connection ................................ 27
Using USB for effects ........................ 28
Wiring Notes ..................................... 29
Allen & Heath 8 ZED-4 BUS User Guide
PANEL DRAWINGS ZED420 —
MIC
INSERT
LINE
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
1
DIR OUT
48V
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
2
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
3
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
4
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
5
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
6
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
7
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
8
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
9
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
10
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
11
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
12
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
13
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
14
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
15
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF
-15
+ 15
+ 15
180
45
LM35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
16
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17-18
-15 + 15
HF
12k
-15
HM
+ 15
2k5
-15
LM
+ 15
250Hz
-15
LF
+ 15
80Hz
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
EQ IN
10
-30
-20
-5
0
5
-10
ST1
LEV
OO
10
-30
-20
-5
0
5
-10
OO
To LR
To CH
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
L
EVEN
R
=
MUTE
PFL
PK !
SIG
10
OO
30
20
ST1IN
R
ST2
L/M
R
10
-30
-20
-5
0
5
-10
ST3
LEV
OO
To LR
To CH
PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL
ST3
L
R
ST4
L/M
R
STEREO INPUTS
ST2
LEV
IN
IN IN
-15 + 15
HF
12k
-15
HM
+ 15
2k5
-15
LM
+ 15
250Hz
-15
LF
+ 15
80Hz
EQ IN
10
-30
-20
-5
0
5
-10
OO
ST4
LEV
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
L
EVEN
R
=
MUTE
PFL
PK !
SIG
0
10
OO
30
20
19-20
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
1
OO
M
+ 6
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
OO
M
+ 6
OO
LEVEL
+ 6
AFL
OO
LEVEL
+ 6
AFL
AUX AUX AUX AUX AUX AUX1 2 3 4 5 6
GRP GRP GRP GRP1 2 3 4
INSERT INSERT INSERT INSERT1 2 3 4
USB
SENDRETUR N
AUX OUT
GROUP OUT
MTX MTX1 2
MATRIX
OUT
L
L
R
L
R
2TRK IN
2TRK OUT
INSERT L
INSERT R
INSERT M
L
R
MAIN OUT
M
PHONES
MIN MAX
MIN MAX
M
LR
+ 16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
+ 16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
PFL/AFL ACTIVE
Talk to LRM
Talk to AUX 1-4
POWER
MTX
1-2
AUX
1-2
AUX
5-6
LR
pre-fade
All up = LR post
OO + 6
PLAYBACK
To LR
ALLEN&HEATH
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
L-R
M
PAN
L R
=
PAN
L R
=
PAN
L R
=
PAN
L R
=
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE MUTE M UTE
AUX1
AFL
AUX2
AFL
AUX3
AFL
AUX4
AFL
AUX5
AFL
AUX6
AFL
GRP L R M
L-R
M
L-R
M
L-R
M
00
1234
USB
2TRK
PLAYBACK SOURCE
LEVEL
PLAYBACK
LEVEL
TB
LEVEL
PHONES
PFL
USB SEND SOURCE
ST3 INPUT SOURCE
USB
ST3 IN
IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN
L R M
MATRIX 2MATRIX
1GRP GRP GRP234
M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
M
L-R
1-2
3-4
M
L-R
1-2
3-4
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
AC MAINS IN ~
100 - 240V~ 47-63Hz 60W MAX
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
REPLACE FUSE WITH SAME TYPE AND RATING.CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE
ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS.
DO NOT OPEN
RISK OF ELECTRIC SHOCK
AVIS: RISQUE DE CHOC ELEC TR IQUE - NE PAS OUVRIR.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
ALLEN&HEATH
OFF
0 I
ON
WARNING: THIS APPARATUS MUST BE EARTHED
Serial No.
ENGINEERED IN EN GLAND BY ALLEN & HEATH LIMITED.
(2) this device must accept any interfer ence r eceived,
This dev ice complies with Part 15 of the FCC Rules.
(1) this device may not cause harmful inter ference, and
Operation is subject to the following tw o conditions :
including inter ference that may cause undesired operation.
T1.6A L 250V 20mm
FUSE
PFL
Allen & Heath 9 ZED-4 BUS User Guide
PANEL DRAWINGS ZED428 —
Allen & Heath ZED-4 BUS User Guide 10
PANEL DRAWINGS ZED436 —
AC MAINS IN ~
100 - 240V~ 47-63Hz 60W MAX
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
REPLACE FUSE WITH SA ME TYPE AND RATING.CAUTI ON: FOR CONTINUE D PROTECTION AGAINST RISK OF FIRE
ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN V AL EURS .
DO NOT OPEN
RISK OF ELECTRI C SHOCK
AVIS: RISQUE DE CHOC ELECTRI QUE - NE PAS OUVRIR.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXP OSE THIS APPA RATUS TO RAIN OR MOISTURE.
ALLEN&HEATH
OFF
0 I
ON
WARNING: THIS APPARATUS MUST BE EARTHED
Serial No.
ENGINEERED IN E NGLAND BY ALLEN & HEATH LIMITED.
(2) this dev ice m ust accept any interference received,
This devic e com plies w ith Part 15 of the FCC Rules.
(1) this dev ice m ay not cause harm ful interferenc e, and
Operat ion is subjec t to t he f ollowing two conditions :
including int erference that may c ause undesired operation.
T1.6A L 250V 2 0mm
FUSE
MIC
INSERT
LINE
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
1
DIR OUT
48V
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
2
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
3
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
4
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
5
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
6
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
7
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
8
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
9
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
10
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
11
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
12
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
13
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
14
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
15
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
16
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
EQ IN
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
33-34
-15 + 15
HF
12k
-15
HM
+ 15
2k5
-15
LM
+ 15
250Hz
-15
LF
+ 15
80Hz
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
EQ IN
10
-30
-20
-5 0
5
-10
ST1
LEV
OO
10
-30
-20
-5
0
5
-10
OO
To LRTo CH
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
LEVEN
R
=
MUTE
PFL
PK !
SIG
10
OO
30
20
ST1IN
R
ST2
L/M
R
10
-30
-20
-5 0
5
-10
ST3
LEV
OO
To LRTo CH
PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL
ST3
L
R
ST4
L/M
R
STEREO INPUTS
ST2
LEV
IN
IN IN
-15 + 15
HF
12k
-15
HM
+ 15
2k5
-15
LM
+ 15
250Hz
-15
LF
+ 15
80Hz
EQ IN
10
-30
-20
-5
0
5
-10
OO
ST4
LEV
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
LEVEN
R
=
MUTE
PFL
PK !
SIG
0
10
OO
30
20
35-36
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
17
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
1
OO
M
+ 6
MIC
INSERT
LINE
DIR OUT
48V
17
17
17
17
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
OO
M
+ 6
OO
LEVEL
+ 6
AFL
OO
LEVEL
+ 6
AFL
AUX 1AUX 2AUX 3AUX 4AUX 5AUX 6
GRP1GRP2GRP3GRP4
INSERT 1INSERT 2INSERT 3INSERT 4
USB
SENDRETURN
AUX OUT
GROUP OUT
MTX 1MTX 2
MATRIX
OUT
L
L
R
L
R
2TRK IN
2TRK OUT
INSERT L
INSERT R
INSERT M
L
R
MAIN OUT
M
PHONES
MIN M AX
MIN M AX
M
LR
+ 16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9 + 16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
PFL/AFL ACTIVE
Talk to LRM
Talk to AUX 1-4
POWER
MTX
1-2
AUX
1-2
AUX
5-6
LR
pre-fade
All up = LR post
OO + 6
PLAYBACK
To LR
ALLEN&HEATH
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
L-R
M
PAN
L R
=
PAN
L R
=
PAN
L R
=
PAN
L R
=
PK!
+ 6
0SIG
PK!
+ 6
0SIG
PK!
+ 6
0SIG
PK!
+ 6
0SIG
PK!
+ 6
0SIG
PK!
+ 6
0SIG
PK!
+ 6
0SIG
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE MUTE MUTE
AFL AFL AFL AFL AFL AFL
GRP L R M
L-R
M
L-R
M
L-R
M
00
1 2 3 4
USB
2TRK
PLAYBACK SOURCE
LEVEL
PLAYBACK
LEVEL
TB
LEVEL
PHONES
PFL
USB SEND SOURCE
ST3 INPUT SOURCE
USB
ST3 IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
18
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
18
18
18
18
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
19
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
19
19
19
19
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
20
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
20
20
20
20
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
21
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
21
21
21
21
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
22
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
22
22
22
22
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
23
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
23
23
23
23
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
24
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
24
24
24
24
IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN
L R M
MATRIX 2
MATRIX
1GRP2GRP3GRP4
M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
0 M
L-R
1-2
3-4
M
L-R
1-2
3-4
M
L-R
1-2
3-4
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
25
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
25
25
25
25
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
26
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
26
26
26
26
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
27
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
27
27
27
27
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
28
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
28
28
28
28
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
29
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
29
29
29
29
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
30
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
30
30
30
30
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
31
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
31
31
31
31
IN
-6-10 63 26
GAIN
MIC
0
LINE
100
10 20 30
40
50
32
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+ 15
+ 15
180
45
LM
35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
ODD
PAN
LEVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
32
32
32
32
IN
AUX1 AUX2 AUX3 AUX4 AUX5 AUX6
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
PFL
Allen & Heath ZED-4 BUS User Guide 11
INTRODUCTION TO THE ZED-4 BUS MIXERS
A Technical Overview:
The Allen & Heath ZED-4 mixer has been carefully and lovingly designed in the beautiful county of Cornwall in the UK and is
manufactured alongside a wide range of professional audio mixing consoles. Many of the components used in ZED are exactly
the same as in the larger Allen & Heath products and the construction methods are also very similar utilising individual ver-—
tically mounted channel circuit boards with each rotary control fixed with a metal nut to the front panel. This provides a very
robust product that will resist damage and give years of reliable use. It also makes servicing much easier should it be required,
with the ability to remove one particular channel from the mixer at a time, or easily change a fader.
The audio circuitry is based on years of continual development and refinement, the performance of all the elements within the
mixer scrutinised and perfected to ensure the very best sound quality possible.
Mic/Line Pre-amps:
Based on the pre-amps from the PA series, the ZED series pre-amps use a two stage design, with carefully controlled amounts
of gain in each stage. When amplifying the signal from the XLR input, the gain range is huge 69dB of range to be exact — —
and is very evenly distributed around the gain control, meaning better control of signal level. Most of the gain comes from the
first stage, so unwanted noise is kept to a minimum. There is no “pad” switch, or pad circuit — line level signals are simply
plugged into the second stage of the pre-amp by using the line input jack socket. This has the great advantage of lower noise
when using the line input. (It is common to attenuate line level signals, the amplify them back up again which can give more
noise or hiss).
EQ:
The ZED-4 series mixers are equipped with a 4-band equaliser circuit on each input, based closely on the acclaimed GL2400
EQ. The frequency and response of each has been carefully chosen to give the maximum performance when using the EQ on a
variety of sources.
AUX system:
Six auxiliary sends are provided, two pre-fade, two post fade, and two switched pre or post fade. The Aux master level con-
trols are grouped nicely together in the master section and have AFL (after fade listen) switches for monitoring.
Groups:
The four sub-groups can be used for easy control of groups of inputs, or for applying signal processing such as compression to
groups of signals using the Group Insert connector. The groups have individual outputs and can also be sub-mixed to the main
L-R and Mono mixes.
Main Mix:
In addition to the main L-R stereo bus, there is a Mono bus which can be routed to individually, ideal for feeding low frequency
speaker systems, or creating a mono PA mix.
Mono and Stereo Channels:
The ZED-420, 428 and 436 models have a full complement of 16, 24 and 32 mono inputs respectively, plus two stereo chan-
nels, maximising the number of inputs you get. The Stereo channels are dual, so you can get 4 stereo inputs to mix before you
need to use any mono channels.
USB:
Getting audio to and from a computer easily is now a common requirement for live sound and music production. The way we
have implemented this on ZED is super-flexible and super-easy! No longer do you need to fiddle around the back of your PC
to get to the soundcard inputs, only to find that the levels are all wrong and noisy. Just plug in a USB lead to your ZED, select
the USB routing on the mixer and the device on your computer and that’s it! Quality audio to and from your PC or MAC.
As you can tell, we’re very proud of this product we hope you like it too!
Allen & Heath ZED-4 BUS User Guide 12
SPECIFICATIONS
Operating Levels
Inputs
Mono channel (XLR) Input +6 to 63dBu for nominal (+17dBu in max) –
Mono channel Line Input (Jack socket) +10 to 26dBu (+30dBu maximum) –
Insert point (TRS Jack socket) 0dBu nominal +21dBu maximum
Stereo Input (Jack sockets) 0dBu nominal (control = Off to +10dB)
Stereo input (phono sockets) 0dBu nominal (control = Off to +10dB)
2 Track Input (phono sockets) 0dBu nominal +21dBu maximum
Outputs
L, R & Mono Outputs (XLR) +4dBu nominal. +27dBu maximum.
L, R & M Insert (TRS Jack socket) -2dBu nominal +21dBu maximum
Group Outputs (Jack sockets) +4dBu nominal. +27dBu maximum.
Group Insert (TRS Jack socket) -2dBu nominal +21dBu maximum
Aux Outputs (Jack sockets) -2dBu nominal +21dBu maximum (Bal Option +4)
Matrix Outputs (TRS Jack socket) -2dBu nominal. +21dBu maximum. (Bal Option +4)
2 Track Output (phono sockets) 0dBu nominal. +21dBu maximum.
Direct Out (TRS Jack socket) 0dBu nominal. +21dBu maximum.
Frequency Response
Mic in to Mix L/R Out, 30dB gain +0.5/-1dB 20Hz to 20kHz.
Line in to Mix L/R out 0dB gain +0.5/-1dB 10Hz to 30kHz
Stereo in to Mix L/R out +0.5/-1dB 10Hz to 30kHz
THD+n
Mic in to Mix L/R Out, 0dB gain 1kHz +10dBu out 0.004%
Mic in to Mix L/R Out, 30dB gain 1kHz 0.014%
Line in to Mix L/R out 0dB gain 0dBu 1kHz 0.005%
Stereo in to Mix L/R out 0dB gain +10dBu 1kHz 0.003%
Headroom
Analogue Headroom from nominal (0Vu) 21dB
USB in & out headroom from nominal (0Vu) 14dB
USB Audio CODEC (Coder/Decoder)
USB Audio In/Out USB 1.1 compliant 16bit.
Sample Rate 32, 44.1, or 48kHz
Noise
Mix Noise, LR out, 16 channels routed, Ref +4dBu, 22-22kHz -90dB (-86dBu)
Mix Noise, LR out, 24 channels routed, Ref +4dBu, 22-22kHz -89dB (-85dBu)
Mix Noise, LR out, 32 channels routed, Ref +4dBu, 22-22kHz -88dB (-84dBu)
Mic Pre EIN @ max gain 150R input Z 22-22kHz -127dBu
Allen & Heath ZED-4 BUS User Guide 13
560mm
(22.1 inches)
Dimensions
Weight kg (lb)
Packed Unpacked
ZED-420 17.5 (38.5 lb) 14 (31 lb)
ZED-428 18 (40 lb) 22.5 (56.25 lb)
ZED-436 22 (48.5 lb) 26.5 (58.3 lb)
MIC
INSERT
LINE
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
1
DIR OUT
48V
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
2
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
3
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF-15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
4
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
5
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
6
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
7
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
8
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
9
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
10
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
11
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
12
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
13
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
14
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
15
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
16
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
EQ IN
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
SIG
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
MIC
INSERT
LINE
DIR OUT
48V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
33-34
-15 + 15
HF
12k
-15
HM
+15
2k5
-15
LM
+15
250Hz
-15
LF
+15
80Hz
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
HF
12k
EQ IN
10
-30
-20
-5
0
5
-10
ST1
LEV
OO
10
-30
-20
-5
0
5
-10
OO
To LR
To CH
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
L
EVEN
R
=
MUTE
PFL
PK !
SIG
10
OO
30
20
ST1IN
R
ST2
L/M
R
10
-30
-20
-5
0
5
-10
ST3
LEV
OO
To LR
To CH
PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL PFL
ST3
L
R
ST4
L/M
R
STEREO INPUTS
ST2
LEV
IN
IN IN
-15 + 15
HF
12k
-15
HM
+15
2k5
-15
LM
+15
250Hz
-15
LF
+15
80Hz
EQ IN
10
-30
-20
-5
0
5
-10
OO
ST4
LEV
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
L
EVEN
R
=
MUTE
PFL
PK !
SIG
0
10
OO
30
20
35-36
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
17
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
1
OO
M
+ 6
MIC
INSERT
LINE
DIR OUT
48V
17
17
17
17
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
OO
M
+ 6
OO
LEVEL
+ 6
AFL
OO
LEVEL
+ 6
AFL
AUX AUX AUX AUX AUX AUX
1 2 3 4 5 6
GRP GRP GRP GR P1 2 3 4
INSERT INSERT INSERT INSERT1 2 3 4
USB
SENDRET URN
AUX OUT
GROUP OUT
MTX MTX
1 2
MATRIX
OUT
L
L
R
L
R
2TRK IN
2TRK OUT
INSERT L
INSERT R
INSERT M
L
R
MAIN OUT
M
PHONES
MIN MAX
MIN MAX
M
LR
+16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9 +16
-6
-9
-20
-30
-16
-12
-3
0
+ 3
+ 6
+ 9
PFL/AFL ACTIVE
Tal k to LR M
Tal k to AUX 1-4
POWER
MTX
1-2
AUX
1-2
AUX
5-6
LR
pre- fade
All up =LR post
OO + 6
PLAYBACK
To LR
ALLEN&HEATH
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
L-R
M
PAN
L R
=
PAN
L R
=
PAN
L R
=
PAN
L R
=
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE MU TE MUTE
AFL AFL AFL AFL AFL AFL
GRP L R M
L-R
M
L-R
M
L-R
M
00
1 2 3 4
USB
2TRK
PLAYBACK SOURCE
LEVEL
PLAYBACK
LEVEL
TB
LEVEL
PHONES
PFL
USB SEND SOURCE
ST3 INPUT SOURCE
USB
ST3 IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
18
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
18
18
18
18
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
19
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
19
19
19
19
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
20
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
20
20
20
20
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
21
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
21
21
21
21
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
22
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
22
22
22
22
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
23
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
23
23
23
23
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
24
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
24
24
24
24
IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN
L R M
MATRIX 2M ATRIX
1 2GRP GRP GRP3 4
M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
0M
L-R
1-2
3-4
M
L-R
1-2
3-4
M
L-R
1-2
3-4
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
25
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
25
25
25
25
IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
26
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
26
26
26
26
IN
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
27
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
27
27
27
27
IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
28
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
28
28
28
28
IN
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
29
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
29
29
29
29
IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
30
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
30
30
30
30
IN
-6-10 6326
GAIN
MIC
0
LINE
100
10 20 30
40
50
31
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
31
31
31
31
IN
-6-10 6326
GAIN
MIC
0
LINE
100
1020 30
40
50
32
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
HPF
100Hz
-15
LF -15
+15
+15
180
45
LM35Hz
70
-15
400
1k
250
+15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
EQ IN
12k
80Hz
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
0
10
OO
30
20
MIC
INSERT
LINE
DIR OUT
48V
32
32
32
32
IN
AUX1 AUX2 AUX3 AUX4 AUX5 AUX6
OO +10
0
OO +10
0
OO +10
0
OO +10
0
OO +10
0
OO +10
0
PFL
ZED-420 = 715mm (28.2 inches)
ZED-428 = 930mm (36.6 inches)
ZED-436 = 1135mm (44.7 inches)
120
129
50
R23
Allen & Heath ZED-4 BUS User Guide 14
BLOCK DIAGRAM
Allen & Heath ZED-4 BUS User Guide 15
MONO INPUT CHANNEL
1
2
3
4
5
1
Microphone Input Socket
Standard 3-Pin XLR socket wired as Pin 1=Chassis, Pin 2=hot (+),
Pin 3=Cold (-).
2
Line Input Jack Socket
Standard 1/4” (6.25mm) Jack socket for balanced or unbalanced line
level signals. Wired Tip=Hot(+), Ring=cold (-), Sleeve=Chassis.
The Line input overrides the Mic input, so if you want to hear some-
thing plugged in to the xlr socket, make sure nothing is plugged into
the Line input.
3
Insert Jack Socket
Standard 1/4” (6.25mm) Jack socket for unbalanced insert send and
return signals. Wired Tip=send, Ring=return, Sleeve=Chassis. Nom-
inal level is 0dBu. The insert point is after the 100Hz filter and be-
fore the EQ.
4
Gain Control
This adjusts the gain of the input amplifier to match the signal level
of the input. The gain is varied from 6dB (attenuation) to +63dB –
for signals plugged in to the xlr socket (Mic Input) and 10dB to –
+26dB for signals plugged into the Line input jack.
5
100Hz Hi-pass Filter
The Hi-pass filter is used for reducing pop noise and rum-
ble from microphone signals. It is a 2-pole (12dB per oc-
tave) filter with a corner frequency set at 100Hz.
The filter affects signals from both Mic XLR and Line jack
socket.
10.00 Hz 100.00 1000.00 10000.00 30000.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
10.00
dBr
6
6
48V Phantom Power Switch
Applies +48V to pins 2 and 3 of the XLR input though 6k8 resistors
for phantom powered condenser microphones.
MIC
INSERT
LINE
-6-10 63 26
GAIN
MIC
0
LINE
10
0
10 20 30
40
50
DIR OUT
48V
HPF
100Hz
1
1
1
1
IN
Direct Output Socket
Standard 1/4” (6.25mm) Jack socket. Wired Tip=Hot(+),
Ring=cold (-), Sleeve=Chassis. For recording individual channels,
factory default is prefade signal (post mute).
The nominal level is 0dBu and the output is impedance balanced.
7
7
Allen & Heath ZED-4 BUS User Guide 16
MONO INPUT CHANNEL
7
8
HMF EQ
The HMF (High Mid Frequency) equaliser affects the upper middle
of the audible frequency range. The frequency graduations on the
sweep control are the centre frequencies of the EQ.
HF EQ
The HF (High Frequency) equaliser affects the frequency response
of the higher audible frequencies. The corner frequency of 12kHz is
around 3dB from the maximum cut or boost of the circuit.
6
-15
LF -15
+ 15
+ 15
180
45
LM 35Hz
70
-15
400
1k
250
+ 15
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+ 15
HF
EQ IN
12k
80Hz
7
8
6
20.00 Hz 100.00 1000.00 10000.00 30000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
20.00 Hz 100.00 1000.00 10000.00 30000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
LMF EQ
The LMF (Lower Mid Frequency) equaliser affects the lower middle
of the audible frequency range.
20.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
Allen & Heath ZED-4 BUS User Guide 17
LF EQ
The LF (Low Frequency) equaliser affects the response at the low
end of the audio range. The graph shows the response of the LF EQ
at maximum cut and boost. The corner frequency is 80Hz.
MONO INPUT CHANNEL
9
10
11
11
12
9
Auxes 1 & 2
Each of these controls sends a signal to an auxiliary bus. The signal is
sourced pre-fade which means that the level is independent of, and
unaffected by the fader. Auxes 1 & 2 are primarily used for foldback
monitoring purposes, as the fader does not affect the level. They can
also be used as feeds for recording and are available sources to the
USB interface for this purpose.
These sends are affected by the Mute switch, so muting the channel
will also mute the Aux sends.
The control varies the signal level to the bus from off (fully attenuat-
ed) to +6dB, with unity gain at the arrow.
There are master level controls for all of the Aux outputs situated in
the master section of the mixer.
10
Auxes 3 & 4
These are switched pre or post-fade so they can be used as either
monitor sends or effects sends.
12
13
20.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
EQ IN
The EQ IN switch enables the equaliser when pushed in. The EQ is
bypassed when the switch is in its up position.
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
+ 6
AUX5
POST
+ 6
AUX6
POST
PRE
POST
OO
OO
OO
OO
OO
OO
-15
LF
+ 15
EQ IN
80Hz
Auxes 5 & 6
Sourced post fade, so that the level is set with the send control but
will be affected by the fader position. Mainly used for effects.
13
Allen & Heath ZED-4 BUS User Guide 18
14
PAN
The pan control adjusts how the signal from the mono input channel is
shared between the left and right buses and subsequently the main stereo
outputs, similarly to pairs of Groups. Set to the mid position, equal amounts
of signal are fed to left and right, with pan set to L, none is sent to the Right
bus.
PFL Switch
The PFL (Pre-Fade Listen) switch sends the channel signal to the PFL bus
and subsequently to the headphones and the main L R meters. Used for
checking the audio signal before raising the fader or un-muting the channel.
15
Mute Switch
This mutes or cuts the signal to the buses and the Direct Out. A rectangular
LED illuminates to show the Mute switch is pressed.
14
Routing Switches
The routing switches connect the post-fade signal to the mix buses via the
pan control for the main LR bus and the group buses. For minimum noise
from the mix bus summing amplifier, leave the switches in their up positions
if the channel signal is not required on the bus.
MONO INPUT CHANNEL
1
ODD
PAN
L
EVEN
R
=
MUTE
PK !
PFL
SIG
M
L-R
1-2
3-4
10
OO
30
20
0
15
Signal & PK! LED
The Signal LED illuminates dimly at a threshold of 16dB nominal level and –
gets brighter with higher level signal. The source for the signal & peak LED’s
is just after the EQ IN switch.
The PK! LED illuminates when the signal just after the EQ IN switch is with-
in 5dB of clipping.
16
17
18
16
17
18
19 19
Fader
The 100mm fader affects the level of the channel signal to the left & right,
mono and group buses and Auxes 5 & 6. Also Auxes 3 & 4 if switched to
post-fade. There is 10dB of gain at the top and the unity gain position is
marked by “0”.
Allen & Heath ZED-4 BUS User Guide 19
STEREO INPUT CHANNEL
2
4
1 ST1 (& ST3) Phono sockets
These are stereo inputs additional to the main stereo channel in-
puts (below). The gain is varied by the ST1 (& ST3) level control
and these inputs can be sent to either the stereo channels or
straight to the L R main bus, depending on the setting of the under-
panel switch. These inputs are unbalanced.
The source for the ST3 input can be switched from the phono
sockets to the USB return signal with the selector switch below the
USB socket.
1
5
3
2
Stereo Inputs 1 (& 3) Level control
Adjust the level of the stereo inputs 1 & 3 from off (fully attenuat-
ed) to maximum where it has 10dB of gain.
3
4
5
ST1 (& 3) Routing selector switch
This switch selects whether the ST1 (or ST3) signal is sent to the L
R bus directly, or the stereo channel below. When it is pressed in,
the ST1 (or ST3) signal sums together with the main stereo inputs
ST2 (or ST4).
ST2 (& ST4) input jack sockets
Standard 1/4” jack sockets for line level stereo signals. Can be used
with a mono input where the L/M input will also connect to the R
input if nothing is plugged in to R.
The Stereo 1 inputs accept unbalanced or balanced signals.
Stereo Input ST2 (& ST4) Level control
Adjusts the level of the ST2 (& ST4) input. The range is from off to
+10dB.
10
-30
-20
-5
0
5
-10
ST1
LEV
OO
10
-30
-20
-5
0
5
-10
OO
To LR
To CH
ST1 IN
R
ST2
L/M
R
ST2
LEV
IN
L
Allen & Heath ZED-4 BUS User Guide 20
STEREO INPUT CHANNEL
STEREO Channel EQ
The EQ on the stereo Channel is 4 band, fixed frequency and com-
prises a shelving high frequency section, a shelving low frequency
section and two fixed mid frequency controls.
6
7
-15 + 15
HF
12k
-15
HM
+ 15
2k5
-15
LM
+ 15
250Hz
-15
LF
+ 15
80Hz
EQ IN
20.00 Hz 100.00 1000.00 10000.00 30000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
STEREO HF EQ
STEREO LF EQ
10.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
10.00 Hz 100.00 1000.00 10000.00
-20.00
-15.00
-10.00
-5.00
0.00
5.00
10.00
15.00
20.00
dBr
STEREO LMF AND HMF EQ
EQ IN
The EQ IN switch enables the
equaliser when pushed in. The
EQ is bypassed when the switch
is in its up position.
6
7
Allen & Heath ZED-4 BUS User Guide 21
8
9
10
11
Balance control
The Balance control varies the relative levels between the left and right
channels.
12
Mute Switch
Mutes the signals to the main L R, M and Group buses as well as the Aux
sends.
13
17-18
+ 6
AUX1
PRE
+ 6
AUX2
PRE
+ 6
AUX3
+ 6
AUX4
PRE
POST
OO
OO
OO
OO
+ 6
AUX5
POST
+ 6
AUX6
POST
OO
OO
ODD
BAL
L
EVEN
R
=
MUTE
PFL
PK !
SIG
10
OO
30
20
0
M
L-R
1-2
3-4
STEREO INPUT CHANNEL
8
Auxes 1 & 2
Auxes 1 & 2 send a mono sum of the stereo channel left & right signals
sourced from pre-fader.
Auxes 3 & 4
Again, a mono sum of the stereo channel left & right signals, the source be-
ing switchable pre or post fader.
Auxes 5 & 6
Auxes 5 & 6 take their source from a mono sum of the stereo channel left &
right signals after the fader.
9
10
11
12
PFL Switch
The PFL (Pre-Fade Listen) switch sends a mono sum of the stereo channel
channel signal to the PFL bus.
Routing Switches
The routing switches connect the post-fade signal to the mix buses via the
balance control for L_R and the groups. For minimum noise from the mix
bus summing amplifier, leave the switches in their up positions if the channel
signal is not required on the bus.
Signal & PK! LED
The Signal LED illuminates dimly at a threshold of 16dB on either left or –
right channels and gets brighter with higher level signal. The source for the
signal & peak LED’s is just after the EQ IN switch.
The PK! LED illuminates when the signal just after the EQ IN switch is with-
in 5dB of clipping.
Fader
The 100mm fader affects the level of the channel signal to the left & right,
mono and group buses and Auxes 5 & 6. Also Auxes 3 & 4 if switched to
post-fade. There is 10dB of gain at the top and the unity gain position is
marked by “0”.
13
14
14
15
15
16
16
Allen & Heath ZED-4 BUS User Guide 22
MATRIX OUTPUTS & AUX MASTERS
Matrix Outputs
There are two matrix sub-mix sections in ZED-4. The send controls
(black & red knobs) take the post-fade signals from the Group, Left,
Right and Mono mix paths and send them to the Matrix output. Matrix
outputs 1 & 2 are individual mono outputs. There is a master level con-
trol to adjust the overall output level, and an AFL (after fade listen)
switch to check the Matrix mix.
Uses for Matrix outputs include:
ď‚· Record feeds. Enabling a different mix from the main PA mix to
be recorded, where more of the backline sound can be dialled in
to the record mix if it is low in the main PA mix.
ď‚· Zone feeds. For creating individual outputs for different areas to
the main PA arena.
ď‚· Delay stack feeds. Enabling individual mix and level control of
delayed speakers in large auditoriums.
 Broadcast feeds for live events that are “on air” or “on line!”
The Matrix and the Auxiliary outputs are impedance balanced as stand-
ard from the factory. There is the option to fit balanced drivers at a
service centre convert the outputs to be fully electronically balanced.
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
1
OO
M
+ 6
OO
R
OO
L
OO
+ 6
+ 6
+ 6
GRP
OO
GRP
OO
GRP
OO
GRP
+ 6
+ 6
+ 6
OO
M
+ 6
OO
LEVEL
+ 6
AFL
OO
LEVEL
+ 6
AFL
MATRIX 2MATRIX
AUX1
AFL
AUX2
AFL
AUX3
AFL
AUX4
AFL
AUX5
AFL
AUX6
AFL
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
OO + 10
0
Auxiliary Output Master Level controls
The Aux master level controls adjust the overall level of each of the
Aux mixes 1 to 6. The range of control is from off (fully attenuated) to
+10dB.
There is an AFL (after fade listen) switch on each Aux mix to check the
signal after the master level control.
Allen & Heath ZED-4 BUS User Guide 23
GROUP MASTERS
Group Fader
The Group fader is fed with the Group mix signal via
the Group Insert point. The fader has 100mm of
travel and there is +10dB of gain at its maximum
position.
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
OO
30
5
10
20
5
0
10
L-R
M
PAN
L R
=
PAN
L R
=
PAN
L R
=
PAN
L R
=
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
PK!
+ 6
0
SIG
MUTE
AFL
MUTE
AFL
MUTE
AFL
MUTE
AFL
GRP
L-R
M
L-R
M
L-R
M
1 2 3 4
1GRP GRP GRP2 3 4
6
5
4
3
2
1
Group AFL
The AFL switch allows monitoring of the Group
signal after the fader but before the Mute switch.
Group Mute
The illuminated Mute switch cuts the Group signal
from the Group output, sub routing and the Group
meter.
The Group signal to the Matrix outputs is also cut
with the Mute switch.
Group Meter
A 4 LED bar meter to show the level of signal on
the Group output.
The thresholds are:
Sig = -18dB nominal, 0dB, +6dB, Pk=+16dB.
0dB on the meter = +4dBu at the balanced output.
Group Pan
The Pan controls how the Group signal is shared
between the Left & Right main mix buses when sub-
routed. The Group output is unaffected by the Pan
control.
Group Sub Routing
The L-R switch routes the panned Group signal to
the main LR mix and the M switch routes the un-
panned Group signal to the mono bus.
If you want to set up a stereo pair of sub-groups and
route them to the main LR mix, make sure the odd
numbered Group is panned Left and the Even Group
is panned Right.
1
2
3
4
5
6

Produktspezifikationen

Marke: Allen & Heath
Kategorie: Mischpult
Modell: ZED-420

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