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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.
(* Priority/VOX muting is only available for inputs 1-6. Inputs 7-8 have no priority levels.)
DIP 1
Switch 1 - ON - Enables Phantom power to the Mic on input 1.
Switch 2 - ON - Sets Input 1 priority or VOX to ON.
Switch 3 - Sets Line 1 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 1 Select - OFF - Mic, ON - Line
DIP 2
Switch 1 - ON - Enables Phantom power to the Mic on input 2.
Switch 2 - ON - Sets Input 2 priority or VOX to ON.
Switch 3 - Sets Line 2 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 2 Select - OFF - Mic, ON - Line
DIP 3
Switch 1 - ON - Enables Phantom power to the Mic on input 3.
Switch 2 - ON - Sets Input 3 priority or VOX to ON.
Switch 3 - Sets Line 3 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 3 Select - OFF - Mic, ON - Line
DIP 4
Switch 1 - ON - Enables Phantom power to the Mic on input 4.
Switch 2 - ON - Sets Input 4 priority or VOX to ON.
Switch 3 - Sets Line 4 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 4 Select - OFF - Mic, ON - Line
DIP 5
Switch 1 - ON - Enables Phantom power to the Mic on input 5.
Switch 2 - ON - Sets Input 5 priority or VOX to ON.
Switch 3 - Sets Line 5 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 5 Select - OFF - Mic, ON - Line
DIP 6
Switch 1 - ON - Enables Phantom power to the Mic on input 6.
Switch 2 - ON - Sets Input 6 priority or VOX to ON.
Switch 3 - Sets Line 6 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 4 - Input 6 Select - OFF - Mic, ON - Line
Input 1: When VOX is enabled on input 1 it will override inputs 2 - 8.
Input 2: When VOX is enabled on input 2 it will override inputs 3 - 8.
Input 3: When VOX is enabled on input 3 it will override inputs 4 - 8.
Input 4: When VOX is enabled on input 4 it will override inputs 5 - 8.
Input 5: When VOX is enabled on input 5 it will override inputs 6 - 8.
Input 6: When VOX is enabled on input 6 it will override inputs 7 - 8.
DIP 8
DIP 7 sets the input sensitivity of the Line inputs 7 and 8.
DIP 7
5
6
7
8
Switch 1 - Sets Line 7 input sensitivity to either ON - 1V or OFF - 100mV.
Switch 2 - Not Used.
Switch 3 - Not Used.
Switch 4 - Sets Line 8 input sensitivity to either ON - 1V or OFF - 100mV.
DIP 8 sets the functionality of the Alert/Evacuation/Chime outputs
DIP 8
Switch 1 - ON - Hold trigger contact closed to play, OFF - Hold trigger contact closed
momentarily to play.
Switch 2 - ON - Activates MIC pre-announcement chime (activated by PTT on mic inputs)
Switch 3 - Not Used
Switch 4 - Not Used
Switches 5-8 - Sets the Alert to Evacuation tone change-over time (refer to figure 4).
Fig 4.
8
Redback® Proudly Made In Australia
www.altronics.com.au
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