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A 4373
Remote Volume Module
Please read these instructions carefully from front to back prior to installation.
Failure to follow these instructions may prevent the unit from working as designed.
www.redbackaudio.com.au
Redback® 125/250Watt Mixer Amplifiers
A 4377A
A 4387A
Optional Extras
A 4573
Alert/Evacuation Module
Phone: 1300 780 999 Fax: 1300 790 999 Internet: www.altronics.com.au
IMPORTANT NOTE:
They include important setup instructions.
Operating Manual
125 WATT PUBLIC ADDRESS AMPLIFIER
250 WATT PUBLIC ADDRESS AMPLIFIER
A 2280B
Remote Volume Wall Plate
Redback® Proudly Made In Australia
Distributed by Altronic Distributors Pty. Ltd.
User manual revision number: 1.1 19/10/2021
Redback® Proudly Made In Australia
A 4376
Rack Mount Ears
1
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Summary of Contents for Redback A 4387A
- Page 1 Remote Volume Module Alert/Evacuation Module Remote Volume Wall Plate Rack Mount Ears Redback® Proudly Made In Australia Distributed by Altronic Distributors Pty. Ltd. Phone: 1300 780 999 Fax: 1300 790 999 Internet: www.altronics.com.au IMPORTANT NOTE: Please read these instructions carefully from front to back prior to installation.
- Page 2 100% developed, designed & assembled in Australia. Since 1976 we have been manufacturing Redback amplifiers in Perth, Western Australia. With over 40 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support.
- Page 3 Redback® 125/250Watt Mixer Amplifiers OVERVIEW The Redback A 4377A 125 Watt and A 4387A 250 Watt 4 channel mixer amplifiers are specifically designed for applica- tions requiring up to three microphone inputs, without compromising output power and overall performance. The amplifi- ers feature three inputs which can be configured for either microphone or line level operation.
- Page 4 Use this input to connect a portable music player. This input over-rides the rear input 3 and is adjusted via the volume 3 pot. Vox level controls Use these controls to adjust the vox sensitivities of inputs 1-2. Redback® Proudly Made In Australia www.redbackaudio.com.au...
- Page 5 240V AC power socket (Australian standard) Connects to 240V AC mains power with the included IEC lead. The internal fuse is an M205 5Amp for the A 4377A 125 Watt amplifier and an M205 7.5Amp for the A 4387A 250 Watt amplifier. Output Connections Speakers fitted with a 100V line transformer may be connected to these terminals.
- Page 6 Always ensure the total load of the fitted speakers does not exceed the rated output of the amplifier (ie 125 watts for the A 4377A and 250 watts for the A 4387A amplifier) otherwise damage may result. When fitting speakers with line transformers the impedance of the load cannot be measured using a standard multimeter.
- Page 7 NOTE: Take special care with the orientation of the board and remove power from the amplifier before fitting. PHANTOM POWER DIP SWITCHES 1=MIC1 2=MIC2 3=MIC3 EARTH LIFT SWITCH VOX1 VOX2 EARTH LIFT Fig 5 www.redbackaudio.com.au Redback® Proudly Made In Australia...
- Page 8 24V DC supply confirm the capacity of the DC power supply used. TROUBLESHOOTING If the REDBACK Phase 4 amplifier fails to deliver the rated performance, check the following: No Power, No Lights Make sure amplifier power switch is on.
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