www.redbackaudio.com.au
Redback® Proudly Made In Australia
3
Redback®
A 4372 2 x 125 Watt Power Amplifier
Fig 2.
A 4372 rear panel.
Channel 1 and 2 outputs are identical in their functionality.
1,8
Line Input
This is a balanced XLR input with an input sensitivity of 500mV.
2,9
Line Output
This is a balanced XLR output for passing the audio output on to slave amplifiers if required.
3,10
Channel volume control
Use this control to adjust the output volume of the channel.
4,11
24VDC IN
Battery Backup: Provision has been provided to run the amplifier from a suitably rated 24V battery system in the
event of a mains failure. Using appropriately rated cable, connect the battery to the “24V DC In” terminals.
Observe correct polarity when connecting.
NOTE: 24V DC needs to connected to both of the 24V inputs. There is no internal connection between these
terminals.
5,12
DC Resettable fuses
These fuses protect the internal power supply. If the fuses are tripped they are easily reset by pressing the small
buttons on the fuses.
6,13
Output Connections
Speakers fitted with a 100V line transformer may be connected to these terminals. Always ensure that the total
load of the speakers does not exceed the rated output of the amplifier i.e. 80Ω minimum at 100V for 125W.
Otherwise either the DC or mains fuse could blow or the fault led activate and the amp will shut down. Always
be careful to avoid short circuits and connection to the wrong terminals.
7
Mains Power Input
This is for connection to a 230VAC supply. The internal fuse is an M205 7.5Amp.
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
0
2
4
6
8
10
230V AC @ 50Hz
(AC FUSE 7.5A M205)
INPUT
24V DC
+_
1
2
3
1 • Shield
2 • Hot
3 • Cold
2
1
3
RESETTABLE
FUSE
Made in
A
ustralia
by
Altronic Distri
b
utors Pty Ltd
www.redbackaudio.com.au
VOLUME 1
LINE OUT 1
LINE IN 1
CHANNEL 1
+_
100V
OUT 1
1 • Shield
2 • Hot
3 • Cold
2
1
3
RESETTABLE
FUSE
VOLUME 2
LINE OUT 2
LINE IN 2
CHANNEL 2
+_
100V
OUT 2
INPUT
24V DC
+_
1
2
3
2
1
3
2
1
3
0
2
4
6
8
10
1
2
3
2
1
3
2
1
3
4
5
6
7
8
9
10 11
12
13
SPECIFICATIONS
POWER OUTPUTS
Power: ...................................................2 x 125 watts RMS
Distortion:..................................................< 0.5%, @ 1kHz
Output line: ............................................................... 100V
FREQUENCY RESPONSE
Mic inputs :...........................................50Hz - 12kHz, -3dB
MIC SENSITIVITY (3 Pin XLR)
............................... 500mV
SIGNAL TO NOISE RATIO
Mic inputs: .............................. > 75dB below rated output
LINE OUTPUT
.................. 600Ω balanced, 0dB , 3 Pin XLR
OUTPUT CONNECTORS
Speakers: ...................................................Screw terminals
INPUT CONNECTORS
Inputs: ..................................................3 pin XLR balanced
24V DC power: ..........................................Screw terminals
240V AC power: ................................IEC power connector
CONTROLS
Mic inputs: .............................................................Volume
Power: ...........................................................On/off switch
Indicators:......................Power, signal present, output peak
limiting, overtemp ,current limit, Protect, Half Power, 24V
DC, Mains
POWER SUPPLY:
................................240V AC or 24V DC
FUSE PROTECTION
: .........................7.5A AC , 2x 10A DC
DIMENSIONS
...................................≈483W x 410D x 88H
*Specifications subject to change without notice
