User Manual

Redback® A 4275B/85B 125/250W Mixer Amplier
www.redbackaudio.com.au Redback® Proudly Made In Australia 17
Redback® A 4275C/85C 125/250W Mixer Amplier
Setup
2.7 Remote Volume Connection
A two way euro block terminal has been provided for the connection of a remote volume control.
A potentiometer needs to be wired to these two terminals.
**DO NOT LINK OR SHORT THESE TERMINALS**
A 1kΩ potentiometer is required for the remote volume to work correctly. The Redback A 2280B shown below would
be suitable.
The maximum distance from the amplier the potentiometer can be connected is 100 metres. Fig 2.7 shows a typical
connection.
Redback A 2280B (
Wallplate tted with 1KΩ
Potentiometer)
Fig 2.7
DIP 5
DIP 4
24V DC IN
+
_
PTT
(short to
activate)
Power Fail
(Contacts
close on
power fail)
SendReturn
Tape Out
Preamp Out
Link To Charge
Backup battery
ALERT - EVAC MODULE
Output Levels
Voice Chime Alert
Over & Evac
EV
COMCANCH
AL
Triggers
L
R
+
–
Rem. Vol
Connect
to 1KΩ Pot
24V DC
Switched
Output
Interface
Balanced Line
1 2
3
1 2 3 4 5 6 7 8
1 2 3 4
1KΩ Potentiometer