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Redback Phase5® 100 Watt 100V Public Address PA Amplifier A4047


Special Order Item: Ships in 5 - 10 days

Quick Overview

Availability: Out of stock

Phase5® are the fifth generation of Redback's flagship public address amplifier range. The Phase5 range represents many hundreds of hours of R&D and consultation with pro-sound professionals. They offer an outstanding feature set for installations requiring a flexible amplifier solution without sacrificing value for money.

Product Number: POS-135619
Brand: Redback
Model Number: A4047
Condition: New
Warranty: 10 Years
Color: Black
Weight: 8700

Redback Phase5® 100 Watt 100V Public Address PA Amplifier A4047

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Redback Phase5® 100 Watt 100V Public Address Amplifier A4047

Designed to meet the requirements of medium sized professional public address installations, delivering an output power of 100W RMS. Frequency response extends from 60Hz to 15kHz at a total harmonic distortion (THD) of less than 0.5%. Features include, VOX muting, three balanced XLR microphone inputs, three line RCA inputs, bass and treble controls, enabling a diversity of installation applications, including schools, public halls, workshops and sporting complexes. Inbuilt VOX muting allows input 1 (mic or line) to mute inputs 2-3 and input 2 (mic or line) to mute input 3.

Powered from 240V AC mains or 24V DC permitting battery backup operation during mains power failure. Output is 100V line, 70V line or low impedance operation is available with internal configuration. All units feature thermal overload shutdown to protect the amplifier if a speaker fault condition develops.

Key Features
- 3 balanced microphone inputs
- Phantom power on mic inputs
- 3 line inputs
- 19" rack mount kit included
- VOX muting
- Tape output RCA sockets
- Bass and treble tone controls
- 100V line output (4-16Ω/70V by request)
- 240V AC or 24V DC operation
- Built in short circuit protection
- 10 year warranty
- Optional evac module available
- Optional remote volume module
- Australian designed & assembled

User Manual (PDF, 2.15MB)

A 4573 Alert/evac option board

When fitted, generates pre chime, bell, alert and evacuation tones. The alert tone can function continuously, or switch to evac tone after a preset time delay (adjustable 30 seconds to 4.5 minutes). Simply connects to the amplifier internally via the cable provided.

A 4373 Digital remote volume option board

When fitted and used in conjunction with A 2280B wallplate to provide remote volume level adjustment. Ideal for situations where the amplifier is located in a remote rack.


Power Output: 100 watts RMS
Distortion: < 0.5% @ 1kHz
Signal to Noise Ratio: Typically 75dB below rated output - All inputs
Mic inputs: 50Hz - 10kHz, -3dB
Line inputs: 60Hz - 15kHz, -3dB
Output line: 100V (4-16Ω/70V by request)
Mic 1-3: 3mV
Line inputs 1-3: 300mV
Speakers: Screw terminals
Current Draw: 220mA Standby, 7A Full @ 24V DC
Protection: 4A AC fuse and 8A DC fuse
Weight: 9kg
Dimensions: 423W x 225D x 88H mm

Input Connectors
Mic 1-3: 3 pin XLR balanced
Line inputs 1-3: RCA stereo socket
24V DC power: Screw terminals
240V AC power: IEC power connector
VOX Muting: 60dB below rated output
Remote volume: Screw terminals

Mic inputs: Volume
Line inputs: Volume
Bass: ±10dB @ 100Hz
Treble: ±13dB @ 10kHz
Power: On/off switch
Indicators: Power, Overload
Power supply: 240V AC or 24V DC

10 Years
Redback products have a long tried and tested history of bulletproof reliability, and because of this, this Public Address Amplifier includes a huge 10 year Australian warranty.

If you experience any issues with this product please don't hesitate to contact us.
How much does delivery cost?
Nothing! We offer free post on all orders to anywhere within the Australian mainland and Tasmania.

Can I pick up my purchase from your store?
Yes. You can usually pick up your order from one of our stores. We recommend that you contact us first to ensure your order is ready for collection.

What happens if I'm not happy with my product when it arrives?
We offer a 30 day 100% satisfaction guarantee on all of our products! If your order arrives damaged, faulty or not quite as you expected, please contact us and we will do everything we can to fix the situation.

Please visit our FAQ page for answers to other frequently asked questions or contact us if you have any other questions or comments.
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