REDBACK A 4017 15 Watt Amplifier Instruction Manual

: June 11, 2024
: redback

Table of Contents

REDBACK A 4017 15 Watt Amplifier
OVERVIEW
FEATURES
REAR PANEL GUIDE
FRONT PANEL GUIDE
TROUBLE SHOOTING
SPECIFICATIONS
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

REDBACK A 4017 15 Watt Amplifier

OVERVIEW

The redback A 4017 PA Amplifier is super compact and ideally suited to smaller PA System Installations. Designed around the TDA1519C IC it offers virtual “destruction proof” operation even under severe misuse such as over voltage, over temperature, over load and short circuit speaker line conditions. The amplifier is extremely stable even when microphone and speaker cables are run together over long distances. The unit will automatically shutdown when overloaded and will restore to normal operation when the fault is removed.

FEATURES

15W RMS Output
1 balanced XLR and unbalanced jack mic input
1 Auxiliary Input
4-16Ω Output
12V DC operation
Headphone Socket
Selectable 12V DC Phantom Power on Mic Input
Music Input on Front Panel
Selectable Aux Input Sensitivity
Power Status Indicator

POWER SUPPLY
The amplifier operates on 12V DC, which makes it suitable for use in vehicles which run of 12V DC. Ensure power is switched OFF at the front panel before connecting power.

AUDIO CONNECTIONS
Audio input is via a 3 pin balanced XLR socket on the rear of the unit or a 6.5mm jack on the front of the unit, both of which are for a low level Microphone Input. Both of these inputs are controlled by the Mic volume control on the front of the unit. Phantom power is available for these inputs selectable by the DIP switches on the rear of the unit.

Dual RCA sockets on the rear of the amplifier, and a 3.5mm Jack input on the front of the amplifier for portable devices such as mobile phones and music players, provide a line level audio input. Both of these inputs are controlled by the Aux volume control on the front of the unit. The sensitivity of this input is selectable via the DIP switches on the rear of the unit.

SPEAKER CONNECTIONS
Speakers with a total impedance or 4-16Ω may be connected to the terminals marked 4-16Ω on the rear of the amplifier. The speaker outputs are internally protected by polyswitches which will disconnect the speaker line when over- driven.

REAR PANEL GUIDE

Fig 1 shows the layout of the A 4017 front panel.

DC Fuse (3A M205)
This fuse protects the internal power supply. Replace with M205 3A rated fuse only.
12V DC Input (Main Supply)
Connects to a 12V DC supply with at least 2 amp current capacity. An M 8936 12V, 2Amp plugpack is supplied for this purpose. (Please observe the polarity)
12V DC Input (Backup)
Connects to a 12V DC supply with at least 2 Amp current capacity. (Please observe the polarity)
Speaker Output
Connect this to the speakers. The Impedance of the speaker load must be between 4-16Ω.
Headphone Output
This is a standard stereo headphone output which takes a 3.5mm Jack connector.
Aux Input
This is a dual RCA input which is internally mixed to produce a mono input signal. The input sensitivity is adjustable to 200mV or 1V.
DIP Switches
These DIP switches set the phantom power to the microphone input and adjust the Aux input sensitivitty. (See DIP switch settings for more detail.)
Mic Input
This is a balanced XLR microphone input.

DIP SWITCH SETTINGS

DIP Switch Settings

SW| On| Off
1| AUX Input

Sensitivity 1V

| AUX Input

Sensitivity 200mV

2| Not Used|
3| Not Used|
4| Mic Phantom

Power On

| Mic Phantom

Power Off

FRONT PANEL GUIDE

Fig 2 shows the layout of the A 4017 rear panel.

Mic Input
This is an unbalanced microphone input which is mixed with the Mic Input on the rear of the unit.
Mic Volume
use this to adjust the microphone input/s volume.
Aux Volume
use this to adjust the Aux and Music input’s volume.
Music Input
Use this input to connect a portable music player. This input will mix with the Aux input on the rear of the unit and is adjusted via the Aux volume control.
On Indicator
This led indicates the unit has power.
Power Switch
Use this to turn the unit on.

TROUBLE SHOOTING

If the REDBACK 15W amplifier fails to deliver the rated performance, check the following:

No Power, No Lights
Make sure amplifier power switch is on. Check the DC fuse. Replace with only the correct type and rating. Over rated fuses will invalidate warranty.
Distorted Output
Check that the speaker type is correct for the output that you are using (ie. 4-16Ω). Check for any short circuits on the speaker line.
Very Low Output Volume
Make sure that the input is the correct level (check for shorted connectors). Check for any short circuits on the speaker line.
Continually Blows Fuses
Make sure that the speaker line is not shorted. Check speaker types, ratings and if on correct output. Amplifier Keeps on Cutting In & Out Check speaker types, ratings and for any short circuits on the speaker line.

SPECIFICATIONS

POWER OUTPUTS
A 4016:…………………………….. 15 watts RMS @ 13.8V into 4Ω
Distortion:…………………………………………………… < 3%, @ 1kHz

SIGNAL TO NOISE RATIO
typically 75dB below rated output

FREQUENCY RESPONSE
Mic inputs:………………………………………….. 50Hz – 12kHz, -3dB
Line inputs:…………………………………………. 50Hz – 20kHz, -3dB

SENSITIVITY
Mic inputs: Rear………………………………………… 1.5mV balanced
Front………………………………….. 1.5mV unbalanced
Line inputs:………………………………………………………………. mV/1V

CONTROLS
Mic inputs:……………………………………………………………… Volume
Line inputs:…………………………………………………………….. Volume
Power:…………………………………………………………… On/off switch
Indicators:………………………………………………………………… Power

OUTPUT CONNECTORS
Speakers:……………………………………………………. Screw terminals
Headphones:…………………………………………………. 3.5mm socket

INPUT CONNECTORS

Mic Inputs:…………………………………………… 3 pin XLR balanced
………………………….or 6.35mm jack unbalanced
Aux input:………………………………………..RCA stereo socket
Music Input:………………………………………. 3.5mm stereo socket
12V DC power:…………………………………………… Screw terminals
………………………………….or 2.1mm DC Jack
CURRENT DRAW:…………………………………. Min ≈ 60 mA
………………………………….. Max ≈ 1.7A
FUSE PROTECTION:…………………………………….. 3A DC
DIMENSIONS:…………………………… ≈210W x 140D x 44H
WEIGHT…………………………………………………… ≈0.38kg
COLOUR………………………………………………………. Black

*Specifications subject to change without notice

REDBACK is a registered trademark of Altronic Distributors Pty Ltd
Since 1976 Redback amplifiers have been manufactured in Perth, Western Australia by Altronics. With over 45 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support. We believe there is significant added value for customers when purchasing an Australian made Redback amplifier or PA product

Australian Made Status
All Redback house products made by Altronics will now be sporting the official 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.

The new adoption of the Australian Made logo will help us get the word out to local and export markets that our products carry the official compliance seal of the Australian Made campaign. We have always pushed our ‘local is better’ line in all of our marketing efforts, it’s always an added boost when you are backed up by a widely recognised and respected icon.

Industry leading 10 year warranty.
There’s a reason we have the industry leading DECADE warranty. It’s because of a long tried and tested history of bullet-proof reliability. We’ve heard PA contractors tell us they still see the original Redford amplifier still in service in schools – that’s over 40 years of operation – and still going strong!

Should a product become faulty please contact us to obtain a return authorisation number. Please ensure you have all the relevant documentation on hand. We do not accept unauthorised returns. Proof of purchase is required so please retain your invoice.

Distributed by Altronic Distributors Pty. Ltd.
Phone: 1300 780 999 Fax: 1300 790 999 Internet: www.altronics.com.au

www.redbackaudio.com.au