User Manual

Redback® A 4275B/85B 125/250W Mixer Amplier
www.redbackaudio.com.au Redback® Proudly Made In Australia 5
Redback® A 4275C/85C 125/250W Mixer Amplier
1.4 FRONT PANEL GUIDE
Fig 1.4 shows the layout of the front panel.
Fig 1.4
1 Inputs 1-6 volume controls
Use these controls to adjust the output volume of inputs 1-6.
2 Optional Music Input Module
Remove this cover to install optional music input module. This module over-rides the rear input 6 and is
adjusted via the volume 6 pot.
3 LCD
Displays amplier status, input and output levels, heatsink temperature, faults, voltage input and input labels.
4 Power Switch
Use this to turn the unit on.
5 On Indicator
This led indicates the unit has power.
6 Fault Indicator
This led indicates when the amplier has a fault.
7 Master Volume
Use this control to adjust the master volume. This is a mutli-turn adjustable control.
8 USB - PS2 compatible keyboard input.
Use a standard PS2-USB keyboard (such as Redback D 2111) to label inputs, installer information and to access
some additional features. (see section 1.10 for more details)
9 Bass and Treble Controls
Use these controls to adjust the bass and treble.
10 Music Input
Use this input to connect a portable music player. This input over-rides the rear input 6 and the optional
Music input module (if tted) and is adjusted via the volume 6 pot.
11 Vox level controls
Use these controls to adjust the vox sensitivities of inputs 1-3.
Overview
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Power
Fault
INPUTS
Model : A 4275C
125W
Mixer Amplifier
TrebleBass
Master Volume
On
1
2
3
4
5
6
Vox
Vox
Music
Input
Keyboard
Vox