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 5 - RB-BL2 Single & RB-BL4 Dual Bi-Directional Matching Converter
5-4 Redbox User Handbook
5.3.1. Balanced to Unbalanced Connections
5.3.1.1. Inputs 1 (& 3) (Left & Right)
The XLR 3 pin sockets used for the left and right channel signals of Input 1 / 1 & 3 are
electronically balanced and have an impedance of 20kΩ bridging. They are routed to
an unbalanced RCA (phono) outputs with an output impedance of <50Ω. Each XLR
has the following connections:
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
5.3.1.2. RCA Phono Outputs 1 (& 3) (Left & Right)
These RCA (phono) outputs are unbalanced and have an output impedance of <50Ω.
5.3.1.3. 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 0dBu to -28dBu ref -
0dBu into the balanced input.
5.3.2. Unbalanced to Balanced Connections
5.3.2.1. RCA Phono Inputs 2 (& 4) (Left & Right)
The two / four left and right RCA inputs are unbalanced and have an impedance of
10kΩ. They are routed to the two / four balanced XLR 3 pin output connectors.
5.3.2.2. Outputs 2 (& 4) (Left & 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.