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
1
1 RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad Stereo Unbalanced
To Balanced Converters
Introduction
Fig 1-1: RB-UL1 & RB-UL2 Front Panel.
Fig 1-2: RB-UL4 Front Panel.
The RB-UL1 single, RB-UL2 dual & RB-UL4 quad stereo units are used for interfacing
domestic, or semi-pro unbalanced equipment to professional balanced line levels.
All connections are on the rear panel. The RCA unbalanced inputs have an impedance of
10kΩ bridging and are routed to the balanced XLR-3 outputs with an output impedance
of <50Ω.
The RB-UL1 has two inputs & outputs, the RB-UL2 has four inputs & outputs and the RB-UL4
has eight inputs & outputs.
The output gain can be individually adjusted for left and right channels by using pre-set
potentiometers accessible through the rear panel. A LED power indicator on the front panel
displays the power supply connection.
System Block Diagram
MATCHING CONVERTERS - RB-UL1, RB-UL2, RB-UL4
Fig 1-3: Block Diagram For a Single Channel (x2 for RB-UL2, x4 for RB-UL4).
MATCHING CONVERTERS
1
Left Input
Consumer/
Unbalanced
Phono
Gain
Left Output
Professional/Balanced
Right Input
Consumer/
Unbalanced
Phono
Gain
Right Output
Professional/Balanced