User Manual
Redback® A 4275B/85B 125/250W Mixer Amplier
www.redbackaudio.com.au Redback® Proudly Made In Australia 3
Redback® A 4275C/85C 125/250W Mixer Amplier
1.0 Overview
1.1 Introduction 4
1.2 Features 4
1.3 What’s in the box 4
1.4 Front panel guide 5
1.5 Rear panel connections 6
1.6 Led Status Indicators 8
1.7 Protect Mode 8
1.8 LCD Status Indicators 8
1.9 LCD Overview 8
1.10 Label the input sources, service information and setting up min and max volumes 10
2.0 Setup
2.1 Setup Guide 11
2.2 Priorities 12
2.3 DIP Switch Settings 13
2.4 Adjusting VOX levels 13
2.5 Installing the A 4573 Alert/Evac Module 15
2.6 PTT and 24V DC Switched Out 16
2.7 Remote Volume Control 17
2.8 Preamp Out, Tape Out, Send and Return 18
2.9 Backup battery charging 19
2.10 Fitting the optional A 2711 MP3 module 20
3.0 Troubleshooting 22
4.0 Specications 23
Contents