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Redback® A 4377/87 Four Input Public Address Amplifier
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.
125/250 WATT 4 INPUT PA AMPLIFIERS
A 4377
A 4387
Optional Extras
A 4573
Alert/Evacuation Module
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
User manual revision number: 1.0 10/09/2018
A 4376
Rack Mount Ears
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Summary of Contents for Redback A 4377
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Page 1: Optional Extras
Redback® A 4377/87 Four Input Public Address Amplifier 125/250 WATT 4 INPUT PA AMPLIFIERS Operating Manual A 4377 125 WATT PUBLIC ADDRESS AMPLIFIER A 4387 250 WATT PUBLIC ADDRESS AMPLIFIER Optional Extras A 4373 A 4573 A 2280B A 4376... - Page 2 Australian Made Status All Redback house products will now be sporting the of cial Australian Made logo. Since starting manu- facturing of commercial audio equipment in the mid 70’s we have always taken pride in producing a quality local product.
- Page 3 Redback® A 4377/87 Four Input Public Address Amplifier OVERVIEW The Redback A 4377 125 Watt and A 4387 250 Watt 4 channel mixer amplifiers are specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifiers feature three inputs which can be configured for either microphone or line level operation.
- Page 4 Redback® A 4377/87 Four Input Public Address Amplifier Figure 1 shows the layout of the front panel. 250W Public Address Ampli er Volume 1 Volume 2 Volume 3 Master Volume Power Model : A 4387 Bass Treble Half Power Over Temp...
- 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 4377 125 Watt amplifier and an M205 7.5Amp for the A 4387 250 Watt amplifier. Output Connections Speakers fitted with a 100V line transformer may be connected to these terminals.
- Page 6 Speakers fitted with 100V line transformers may be connected to the output terminals on the rear of the amplifer. Always ensure the total load of the fitted speakers does not exceed the rated output of the amplifier (ie 125 watts for the A 4377 and 250 watts for the A 4387 amplifier) otherwise damage may result.
- Page 7 Redback® A 4377/87 Four Input Public Address Amplifier PHANTOM POWER All three microphone inputs have DIP switch selectable phantom power. When enabled 15V DC will be connected to the Hot and Cold pins of the corresponding XLR. To access the DIP switches, first disconnect power from the unit and then remove the lid.
- 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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