Redback A 4920 User manual
www.altronics.com.au
User manual revision number: 1.0 22/09/2016
Operating Manual
A 4920 Pre Amplier Balanced Mic/Line Wallplate
Redback® Proudly Made In Australia
Distributed by Altronic Distributors Pty. Ltd.
Phone: 1300 780 999 Fax: 1300 790 999 Internet: www.altronics.com.au
OVERVIEW
This remote mic/line pre-amp wallplate accepts either a microphone or line input for conversion to a balanced high level
signal. The 3V output signal is carried via Cat5e cable, suitable for distribution up to 500m without interference. Mic input
is via a balanced XLR whilst the line input is via 2 x RCA sockets or 3.5mm jack. The Cat5e output cable terminates to an
interface module enabling a balanced mic/line, or unbalanced line signal to be fed into the amplier. Power is supplied via
the included 24V Plugpack which is connected to the interface box. Power for the wallplate is provided through the Cat5e
cable connection.
FEATURES
• Balanced 3 pin XLR mic input
• Dual RCA or 3.5mm line input (Note : audio is internally mixed to become mono signal)
• Up to 500m transmission range
• Uses economical Cat5e cable for connection between wall plate and interface box
• Balanced mic/line or unbalanced line output
• Level control
• Wallplate powered via Cat5e cable from interface box
• 24V DC plugpack supplied
www.altronics.com.auRedback® Proudly Made In Australia
2
REDBACK A 4920 Balanced Mic/Line Pre-Amp Wallplate
Vol
To
Wall
Plate On
24VDC Mic Out Line Out
- + - + R L
A 4920 Balanced Mic/Line Pre-Amp
+_
Cat5e max. 500m
Mic Music Volume
O Max
A 4920 Balanced Mic/Line Pre-Amp
R
L
21
3
24V DC Plugpack
Amplifier Balanced mic/line
Unbalanced line
OR
Microphone
CD Player, Tuner etc
Media Player,
Mobile Phone etc
A 4920 Wallplate
A 4920 Interface Box
Fig. 1: Connection Diagram.
Fig. 2: Fitting of the internal jumper to select either balanced mic level output or balanced line level output.
(To change the jumper, remove the lid from the interface box and then t the jumper for desired output).
Fitting of Internal Jumper
Balanced line
level output
Balanced mic
level output
MIC LEVEL
LINE LEVEL
MIC LEVEL
LINE LEVEL
MIC LEVEL
LINE LEVEL
Jumper
Jumper
Table of contents
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