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.
The unit has six levels of VOX priority on inputs 1-6 with adjustable VOX sensitivities on each input, and a 24V DC output (limited to 120mA current draw) which becomes live when any triggers are activated or VOX/PTT circuitry becomes active.
In addition it incorporates a MP3 based message player for playback of Alert, Evacuation or Chime tones. The Alert and Evacuation tones once triggered, will mute inputs 2-8, regardless of their priority settings.

Tone Generator Operation.
Tones, chimes and pre-recorded messages are played from the micro SD card which plugs into the rear panel of the mixer. Individual level controls are provided for alert/evac, chime and voice over. All of these can be triggered by closing contacts such as switches, from Fire Indicator Boards (FIB) or any other remote contact source.

Adjustable Input Sensitivities.
On the rear panel a DIP switch allows selection of input sensitivity between 3mV, 100mV and 1V, plus phantom power and VOX muting options for each of the inputs.

Power
The mixer is powered by 24V DC and is provided with a 2.1mm DC jack input and a back up 24V DC power source via screw terminal block for use when mains power fails. A 24V DC output is provided (limited to 120mA current draw) which activates when any of the Alert, Evacuation or Chime triggers are operated. It also activates when VOX circuits or any of the PTT muting is activated.

Box Contents
A 4427 Mixer 8 Channel with MP3 active indicator
24V 1A DC Plugpack
Instruction Booklet

Features

• Eight input channels
• Micro SD card message player for audio announcements
• Individual level, bass and treble control on all inputs
• Six levels of VOX priority
• Adjustable VOX sensitivity
• Alert and Evacuation override mode
• 3.5mm music input
• Adjustable input sensitivity on line inputs
• 24V DC battery back up terminals
• In built Alert/Evac/Chime functionality
• 24V DC output
• MP3 active indicator
• LED VU meter
• 10 Year Warranty
• Australian Designed and Manufactured

100% developed, designed & assembled in Australia.
Since 1974 Redback PA products have been manufactured in Perth, Western Australia by Altronics. With over 50 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support. Read more about our Australian Made products

Backed by an industry leading 10 Year Manufacturer Warranty.
Our Redback products have a long tried and tested history of bulletproof reliability. Altronics offers a 10 Year Warranty on all Australian Made Redback products. Our local in-house service department has all the know how to answer technical queries and provide timely service. Read more about our industry leading warranty.

• Altronics Code: A4427A
• I/N: 18408
• Barcode: 9321758143261
• Shipping Weight: 2.95000Kg
• Packaging Sizes
• EACH: 1
• Large Image 1
• Large Image 2
• Instructions
• Brochure

• Output Level: 0dBm
• Distortion:0.01%
• Frequency Response: 140Hz - 20kHz
• Sensitivity:
• Mic inputs: 3mV balanced
• Line inputs: 100mV-1V
• Output Connectors:
• Line out: 3 pin XLR balanced or 2 x RCA
• Switched out: Screw terminals
• Input Connectors:
• Inputs: 3 pin XLR balanced or 2 x RCA, 3.5mm stereo jack front panel
• 24V DC power: Screw terminals
• 24V DC Power: 2.1mm DC Jack
• Remote triggers: Screw Terminals
• Controls:
• Power: Standby Switch
• Bass: ±10dB @ 100Hz
• Treble: ±10dB @ 10kHz
• Master: Volume
• Inputs 1-4: Volume
• Indicators:Power on, MP3 error, MP3 active, Signal Present, VU Meter
• General:
• Power Supply: 24V DC
• Dimensions: 482W x 175D x 44H
• Weight: 2.1kg
• Colour: Black

*Specifications are subject to change without notice.