User Manual
www.redbackaudio.com.au Redback® Proudly Made In Australia 3
Redback® 500Watt Power Amplier
Fig 2 shows a typical install where the A 4390A ampliers are used as slave ampliers with the audio output from the
mixer amplier passed through each slave amplier.
Fig 2
4 -16Ω70V100V
OUTPUTS
L
R
24V DC IN
Balanced Mic
+
_
PTT
(short to
activate)
Power Fail
(Contacts
close on
power fail)
SendReturn
Tape Out
Preamp Out
Link To Charge
Backup battery
Input 1Input 3 Input 2Input 4Input 5Input 6
ALERT - EVAC MODULE
Output Levels
Voice Chime Alert
Over & Evac
EV
COMCANCH
AL
Triggers
L
R
+
–
Rem. Vol
Connect
to 1KΩ Pot
+
–
+
–
+
–
Line
24V DC
Switched
Output
DIP 5
Interface
DIP 4
DIP 1
DIP 2DIP 3
Balanced Mic
Line
Balanced Mic
Line
Balanced Mic
Line
Balanced Mic
Line
Balanced Mic
Line
Balanced Line
L
R
L
R
L
R
L
R
L
R
2 1
3
2 1
3
2 1
3
2 1
3
2 1
3
2 1
3
2 1
3
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
230V AC @ 50Hz
www.altronics.com.au
RESETTABLE
DC FUSE
Made in Australia
by Altronic
Distributors
Pty Ltd
DIP 5
DIP 4
IMPORTANT NOTE
Ensure power is switched OFF when
adjusting DIP switches. New
settings will be effective when
power is switched back on.
DIP 3
SW Item On Off
1
2
Input 6 Level 1V 100mV
3
Not USed
4 Input 5 Level 1V 100mV
Not USed
1
2
3
4
DIP 2
SW Item On Off
Input 4 Level 1V 100mV
Not USed
Input 3 Level 1V 100mV
Input 3 Priority On Off
*
DIP 1
SW Item On Off
1
2
Input 2 Level 1V 100mV
3
Input 2 Priority On Off
4 Input 1 Level 1V 100mV
Input 1 Priority On Off
*
*
SW
Item On
Off
1
2
3
4
Not Used
Not Used
Not Used
Not Used
DIP 4
DIP 1
DIP 2DIP 3
SW
Item On Off
Switched 24VDC Out On Off
Phantom Power Input 6 On Off
On Off
1
2
3
4
Phantom Power Input 5
On Off
5
Phantom Power Input 4
On Off
6
Phantom Power Input 3
On Off
7
Phantom Power Input 2
On Off
8
Phantom Power Input 1
Preamp Out
†
Post
Pre
†
Sets the Preamplifier output to
Pre or Post Master.
DIP 5
Priority or VOX muting is only
functional on inputs 1-3. When
VOX is enabled on input 1 it will
override all other inputs includ-
ing the Alert/Evac Module. VOX
enabled on input 2 will override
inputs 3-6. VOX enabled on input
3 will override inputs 4-6.
If the Alert/Evac module is fitted
it will override inputs 2-6.
*
Model
125W
5AAC Fuse
250W
7.5A
AC Fuse Ratings
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
Speakers fitted with
100V line transformers.
LINK THESE TERMINALS
TO CHARGE BACKUP BATTERY
+
-
4 -16Ω
70V
240V AC @ 50Hz
(Fuse 10A M 205)
VOLUME
100V
1
2
3
1 • Shield
2 • Hot
3 • Cold
LINE IN
Made in Australia by
Altronic Distributors Pty Ltd
www.altronics.com.au
INPUT
24V DC
+
–
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
OUTPUTS
0
2
4
6
8
10
+
–
+
–
+
–
21
3
+
_
24V DC
OUT
(1A Max)
LINK TO
CHARGE
BACKUP
BATTERY
RESETTABLE
FUSE 20 AMP
RESETTABLE
FUSE 20 AMP
LINE OUT
2 1
3
2 1
3
4 -16Ω
70V
240V AC @ 50Hz
(Fuse 10A M 205)
VOLUME
100V
1
2
3
1 • Shield
2 • Hot
3 • Cold
LINE IN
Made in Australia by
Altronic Distributors Pty Ltd
www.altronics.com.au
INPUT
24V DC
+
–
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
OUTPUTS
0
2
4
6
8
10
+
–
+
–
+
–
21
3
+
_
24V DC
OUT
(1A Max)
LINK TO
CHARGE
BACKUP
BATTERY
RESETTABLE
FUSE 20 AMP
RESETTABLE
FUSE 20 AMP
LINE OUT
2 1
3
2 1
3
4 -16Ω
70V
240V AC @ 50Hz
(Fuse 10A M 205)
VOLUME
100V
1
2
3
1 • Shield
2 • Hot
3 • Cold
LINE IN
Made in Australia by
Altronic Distributors Pty Ltd
www.altronics.com.au
INPUT
24V DC
+
–
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
OUTPUTS
0
2
4
6
8
10
+
–
+
–
+
–
21
3
+
_
24V DC
OUT
(1A Max)
LINK TO
CHARGE
BACKUP
BATTERY
RESETTABLE
FUSE 20 AMP
RESETTABLE
FUSE 20 AMP
LINE OUT
2 1
3
2 1
3
SLAVE AMPLIFIER
SLAVE AMPLIFIER
A 4390A AMPLIFIER
MIXER AMPLIFIER