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Redback® A 4937 Balanced Mic/Line Preamp Wallplate
A 4937 3 Mic, Line + Bluetooth Input Preamp Wallplate
OVERVIEW:
The Redback® A 4937 accepts either a microphone level, line level, music or bluetooth input and converts the signal
to a balanced high level output. The high level output signal is carried via Cat5e/6 cable, (suitable for distribution up to
300m without interference) back to Redback® compatible devices such as the Redback® A 4930 Hub, Redback® A 4942,
Redback® A 4946 or Redback® A 4493 Source selector wall plate.
Microphone inputs are balanced XLR inputs, while the Line input is via 2 x RCA sockets, or 3.5mm audio jack for portable
devices. A bluetooth receiver offers the ability to interface Bluetooth audio devices.
Each input has it's own dedicated volume while a master volume sets the overall output volume.
VOX muting is available which mutes the AUX, Music and Bluetooth inputs when any microphone input is active. The VOX
sensitivity is adjustable via the front of the wallplate.
SPECIFICATIONS:
Frequeny Response
Mic input:.....................................................140Hz - 20kHz
Aux input:....................................................140Hz - 20kHz
Music input:..................................................140Hz - 20kHz
Input Sensitivity
Mic input: ......................................... 1mV -13mV balanced
Aux input: ................................... 40mV - 800mV balanced
Music input: ................................ 40mV - 800mV balanced
Connectors
Mic Input: ........................................................... 3 pin XLR
Aux Input: ............................................................. 2 x RCA
Music Input: ...................................... 3.5mm Stereo Socket
User manual revision number: 1.0 106/10/2023
www.redbackaudio.com.au
Operating Manual
Output: ............................................................ RJ45 8P8C
Data transmission: ...... Cat5e/6 cabling (max 300 metres)
Weight: .............................................................. ≈0.19kg
Dimensions: ........... ≈ 145mm(L) x 115mm(W) x 50mm(H)
Power: ................................... Powered over Cat5e/6 cable
Redback® Proudly Made In Australia
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Summary of Contents for Redback A 4937
- Page 1 OVERVIEW: The Redback® A 4937 accepts either a microphone level, line level, music or bluetooth input and converts the signal to a balanced high level output. The high level output signal is carried via Cat5e/6 cable, (suitable for distribution up to 300m without interference) back to Redback®...
- Page 2 Figure 1 shows the connection diagram when connecting the A 4931 or A 4937 wall plates to the Redback® A 4930 MIc/ Line Hub. The A 4931 and A 4937 wall plates can be connected to any of the four wall plate RJ45 connectors as shown.
- Page 3 The A 4937 has a set of DIP switches on the rear which determine how the VOX (voice operated switch) priority functions. Dip switch 3 when set to ON, activates the VOX function. If this switch is in the OFF position the audio from the A 4937 will only override the A 4495 Input Source Wall Plate if the “Local Input”...
- Page 4 A4937_REDBACK_BT. To allow the APP to connect to the A 4937, and change the label name and/or PIN, follow these steps. 1) set DIP switch 4 to “ON”. The BT Status LED will flash RED (Note: It may take up to 3 seconds). Once a connection to the APP has been established the LED will become solid RED.
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