Manual
Table Of Contents
- Analogue Redbox User Handbook rev 1.92
- Contents
- Figures
- Warranty, Safety & Installation Information
- RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers
- RB-SM1 Single & RB-SM2 Dual Stereo To Mono Converter
- RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad Stereo Unbalanced
- RB-LU4 Quad Stereo Balanced To Unbalanced Converter
- RB-BL2 Single & RB-BL4 Dual Bi-Directional Matching Converte
- RB-SL2 Twin Mono, or Stereo, Limiter
- RB-DA6 6 Way Stereo Distribution Amplifier
- RB-HD1 Stereo Headphone Amplifier
- RB-HD6 6 Way Stereo Headphone Distribution Amplifier
- RB-SD1 Silence Detection Unit
- RB-PMX4 10 Input, 4 Output Analogue Preset Mixer
- RB-LI2 Stereo Line Isolation Unit
- RB-PLI6 6 Way Mono Passive Line Isolation Unit
- RB-SS10 10 Way Stereo Analogue Source Selector/Mixer
- RB-LC3 3 Way Light/Power Controller
- Glossary
- Connectors And Cabling
- Index
Chapter 3 - RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad
Stereo Unbalanced to Balanced Converters
Redbox User Handbook 3-3
Fig 3-6: RB-UL4 Rear Panel
3.3.1. RCA Phono Inputs (Left and Right)
The stereo left and right RCA inputs are unbalanced and have an impedance of 10kΩ.
They are routed to the stereo balanced XLR 3 pin output connectors.
3.3.2. Outputs (Left and Right)
The XLR 3 pin output plug connectors are electronically balanced with an output
impedance of <50Ω. They have the following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
3.3.3. 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 range of the
unbalanced to balanced converter is -15dBu to +15dBu ref -15dBu into the
unbalanced input.
Disconnect the mains supply before removing the equipment covers.
This product must be earthed
INPUT 4
LEVEL
L
R
L - OUTPUT 4 - R
INPUT 2
LEVEL
L
R
L - OUTPUT 2 - R
INPUT 1
LEVEL
L
R
L - OUTPUT 1 - R
INPUT 3
LEVEL
L
R
L - OUTPUT 3 - R
3.3.2
3.3.3
3.3.1