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Redback® A 4427 8 Channel Public Address Mixer
8 CHANNEL PA MIXER
Operating Manual
A 4427
8 CHANNEL MIXER WITH MESSAGE PLAYER
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.
They include important setup instructions.
Failure to follow these instructions may prevent the unit from working as designed.
User manual revision number: 1.0 29/10/2018
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Summary of Contents for Redback A 4427
- Page 1 Redback® A 4427 8 Channel Public Address Mixer 8 CHANNEL PA MIXER Operating Manual A 4427 8 CHANNEL MIXER WITH MESSAGE PLAYER 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 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.
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Page 3: What's In The Box
1.0 INTRODUCTION This unique Redback PA mixer features six input channels which are user selectable for either balanced mic or line as well as two dedicated line level RCA inputs and a 3.5mm audio jack for portable devices. In addition it incorporates a MP3 based message player for playback of Alert, Evacuation or Chime tones. -
Page 4: Front Panel Guide
Redback® A 4427 8 Channel Public Address Mixer 4.0 FRONT PANEL GUIDE Fig 1 shows the layout of the A 4427 front panel. 4 5 6 A 4427 8 Channel Mixer Volume 1 Volume 2 Volume 3 Volume 4 Volume 5... -
Page 5: Rear Panel Connections
Redback® A 4427 8 Channel Public Address Mixer 5.0 REAR PANEL CONNECTIONS Fig 2 shows the layout of the A 4427 rear panel. Output Tape Out ALERT/EVAC/CHIME Triggers MODULE 24VDC 24VDC Backup Output (120mA Output Line 8 Line 7 Line 6... - Page 6 Redback® A 4427 8 Channel Public Address Mixer 6.0 CONNECTIONS Fig 3 Redback® Proudly Made In Australia www.altronics.com.au...
- Page 7 Redback® A 4427 8 Channel Public Address Mixer Figure 3 demonstrates a basic install with five input sources. The VOX priorities are set for 3 levels of priority, so that the microphone on input 1 has the highest priority. The input 1 DIP1 switch settings are set for a 100mV sensitivity balanced microphone input with the priority/VOX enabled which makes this input priority level 1.
- Page 8 Redback® A 4427 8 Channel Public Address Mixer 7.0 DIP Switch settings The A 4427 has 8 sets of DIP switches. DIP1 - DIP6 select the inputs 1 - 6 as either Mic or Line, sets the Line Input level sensitivity, enables phantom power and enables VOX priorities for inputs 1-6 as outlined below.
- Page 9 9.0 INSTALLING MP3 FILES You will first need to remove power from the A 4427 then remove the Micro SD card from the rear of the unit. To remove the Micro SD card push the card in and it will eject itself.
- Page 10 Redback® A 4427 8 Channel Public Address Mixer Fig 6 Open the Removable Disk and you should get a window that looks like figure 7. Fig 7 The contents of the SD Card include a Library folder of sample MP3 files and five folders for the MP3 files associated with the various triggers.
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Page 11: Troubleshooting
The card can be removed from the PC following windows safe card removal procedures. Make sure the A 4427 is OFF and insert the SD card into the slot in the rear; it will click when fully inserted. The A 4427 is ready to use. -
Page 12: Specifications
6) With the power turned OFF, insert the SD card back into the A 4427. 7) Turn the A 4427 ON. The unit will check the SD card and if an update is required the A 4427 will perform the update automatically.