Manual
Table Of Contents
- Contents
- Figures
- Warranty
- Safety Information
- 1 RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad Stereo Unbalanced To Balanced Converters
- 2 RB-LU4 Quad Stereo Balanced To Unbalanced Converter
- 3 RB-BL2 Single & RB-BL4 Dual Bi-Directional Matching Converter
- 4 RB-PA2 Dual Stereo RIAA Phono Amplifier
- 5 RB-LI2 Stereo Line Isolation Unit
- 6 RB-PLI6 6 Way Mono Passive Line Isolation Unit
- 7 RB-DA6 & RB-DA6G 6 Way Stereo Distribution Amplifier
- 8 RB-DA4x5 4 Input 4 x 5 Output Distribution Amplifier/Mixer
- 9 RB-DDA6A 6 Way Stereo AES/EBU Digital Distribution Amplifier and RB-DDA6S 6 Way Stereo S/PDIF Dig
- 10 RB-DDA6W 6 Way Word Clock Distribution Amplifier
- 11 RB-HD1 Stereo Headphone Amplifier & RB-HD2 Dual Headphone Amplifier
- 12 RB-HD6 6 Way Headphone Distribution Amplifier
- 13 RB-DHD6 Digital 6 Way Headphone Distribution Amplifier
- 14 Connectors & Cabling
- Glossary
Redbox User Handbook No 2
11
Fig 3-5: RB-BL4 Rear Panel.
Balanced to Unbalanced Connections
Inputs 1 (& 3) (Left & Right)
The XLR 3 pin sockets used for the left and right channel signals of Inputs 1 & 3 are
electronically balanced and have an impedance of 20kΩ bridging. They are routed to
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.
RCA Phono Outputs 1 (& 3) (Left & Right)
These RCA (phono) outputs are unbalanced and have an output impedance of <50Ω.
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.
Unbalanced to Balanced Connections
RCA Phono Inputs 2 (& 4) (Left & Right)
The left and right RCA inputs 2 & 4 are unbalanced and have an impedance of 10kΩ.
They are routed to the balanced XLR 3 pin outputs 2 & 4.
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.
RCA
Phono
Outputs
Balanced
Outputs
Balanced
Outputs
RCA
Phono
Outputs
MATCHING CONVERTERS - RB-BL2 & RB-BL4
RCA Phono
Inputs
RCA Phono
Inputs
Balanced Output
LevelControl
Balanced
Inputs
Unbalanced Output
Level Control
Balanced Output
Level Control
MATCHING CONVERTERS
3
Balanced
Inputs