Redback A 4928 Operating Manual Download Page 3

Redback® A 4928

 Line Output Box

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Redback® Proudly Made In Australia

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Redback® A 4928

 Line Output Box

A 4928 DIP SWITCH SETTINGS

DIP SW 1: ON - 24V DC switched output option active
DIP SW 2 (Balanced Output): ON - High Level output, OFF - Low level output
DIP SW 3: Not Used
DIP SW 4: Not Used

A 4931 and A 4932 DIP SWITCH SETTINGS 

The A 4931 and A 4932 have a set of DIP switches on the rear which determine how the audio is output.
The DIP switches are labelled 1) VOX BOTH, 2) VOX ENABLE, 3) VOX OUTPUT.

When the A 4931 or A 4932 is used with the A 4928 there are four possible audio output options. 

1) Mixed OUT (No switched Output)

 - The audio from the A 4931/32 microphone input and the line and/or music inputs 

are mixed together and output to the A 4928. The VOX Output is inactive.
DIP Switches set as follows: 1-OFF ,2-OFF, 3-OFF

2) Mixed OUT (With switched Output)

 - The audio from the A 4931/32 microphone input and the line and/or music 

inputs are mixed together and output to the A 4928. The VOX Output (and hence the Switched Output) is enabled.
DIP Switches set as follows: 1-ON ,2-OFF, 3-ON

3) Mic Priority Over Line/Music Inputs (No switched Output) 

The A 4931/32 microphone input has VOX priority over 

the line and music inputs. I.e. the audio from the line/Music inputs will be over ridden by the MIc input when a microphone 
is used. The VOX Output is inactive.
DIP Switches set as follows: 1-OFF ,2-ON, 3-OFF.

4) Mic Priority Over Line/Music Inputs (With switched Output) 

The A 4931/32 microphone input has VOX priority over 

the line and music inputs. I.e. the audio from the line/Music inputs will be over ridden by the MIc input when a microphone 
is used. The VOX Output (and hence the Switched Output) is enabled.
DIP Switches set as follows: 1-OFF ,2-ON, 3-ON.
The VOX sensitivity of the microphone is adjusted by the trimpot on the rear of the A 4931 and A 4932 labelled “VOX” or 
“VOX sensitivity”.

DIP SWITCHES

VOX SENSITIVITY

Fig 4 - A 4931 DIP switches and VOX sensitivity adjustment location.

DIP Switches

VOX

Sensitivity

DIP Switches

Fig 5 - A 4932 DIP switches and VOX sensitivity adjustment location.

Fig 3 - A 4928 DIP switches location.

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