Manual

Chapter 4 - RB-LU4 Quad Stereo Balanced to Unbalanced Converter
Redbox User Handbook 4-3
4.3. Rear Panel Connections and Operation
Fig 4-3: RB-LU4 Rear Panel
4.3.1. Inputs 1-4 (Left and Right)
The XLR 3 pin sockets used for the left and right channel inputs of Input 1 are
electronically balanced and have an impedance of 20kΩ bridging. They are routed to
an unbalanced RCA (phono) output with an output impedance of <50Ω. Each XLR has
the following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
4.3.2. RCA Phono Outputs 1-4 (Left and Right)
These RCA (phono) outputs are unbalanced and have an output impedance of <50Ω.
4.3.3. Output Level Adjustment
The output gain can be individually adjusted for left and right channels through pre-
set potentiometers which are accessible through the rear panel. The gain of the
balanced to unbalanced converter is variable within a range of -28dBu to +15dBu ref.
-15dBu into the balanced input.
Disconnect the mains supply before removi ng the equipment covers.
This product must be earthed
OUTPUT 1
LEVEL
L - INPUT 1 - R
L
R
OUTPUT 2
LEVEL
L - INPUT 2 - R
L
R
OUTPUT 3
LEVEL
L - INPUT 3 - R
L
R
OUTPUT 4
LEVEL
L - INPUT 4 - R
L
R