www.altronics.com.au
Redback® Proudly Made In Australia
2
REAR PANEL
1 2
3
4 5
6
7 8
2
1
3
Manufactured in Australia By
Altronic Distributors Pty. Ltd.
www.altronics.com.au
100V
OUT
24V DC
IN
240VAC @ 50Hz
Input 1
Balanced
Input
Sensitivty
L
R
1 2 3 4 5 6 7 8
DIP Switches
(Refer to table1)
Line
Balanced
(3mV) (2V)
Resettable DC FUSE
Output
30W
Fuse
3 Amp
5 Amp
7.5 Amp
60W
100W
Mic Line
- +
+_
- +
+_
1
2
3
1 • Shield
2 • Hot
3 • Cold
Balanced Input
Configuration
3
2
4
6
5
1
Table 1 : DIP Switch Settings
SW
1-6,8
Not Used
7
Line input
Input Senitivity
1V
300mV
SW
Input
On
Off
Output
30W
Fuse
1 Amp
2 Amp
4 Amp
60W
100W
AC Fuse (M 205)
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
Volume
1
240V AC Input
Connect to a 220-240V AC @ 50Hz power source.
2
100V Output
Speakers fitted with a 100V line transformer may be connected. Always ensure that the toal load of the
speakers does not exceed the rated output of the amplifier ie 333Ω minimum at 100V for the A 4230 (30W),
166Ω minimum at 100V for the A 4240 (60W) and 100Ω minimum at 100V for the A 4250 (100W). 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. Refer to Fig 2 and Fig 3 for more details about the
impedance of speakers and how to check the impedance.
3
DIP Switch Settings
The A 4230 range of amplifiers have a set of options which are enabled via the DIP switches 1-8.
Switch 1-7
Not used
Switch 8
sets the input sensitivity for the Dual RCA line input to either 1V or 300mV. Note: this only affects
the
line
input.
4
Audio Input
Input 1 can be used for mic or line input operation. The dual RCA line input has adjustable line input sensitivity
of either 300mV or 1V (Set by DIP switch 8). The balanced XLR input has an adjustable input sensitivity from 3mV
up to 2V. Phantom power is available on the balanced XLR input. Volume is adjusted via the volume pot on the
rear of the unit.
5
Resettable DC Fuse
Used to protect the unit when powered from 24V DC. This fuse is resettable by pressing the red button.
6
24V DC Input
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.
Fig 1
