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
46
Redbox User Handbook No 2
12
HEADPHONE DISTRIBUTION AMPLIFIERS - RB-HD6
Rear Panel Connections and Operation
Stereo/
Mono
Operation
Channel Insertion Inputs
Fig 12-3: RB-HD6 Rear Panel.
Stereo Input (Left and Right)
The XLR-3 input connectors can take balanced professional levels, or unbalanced by using
the front panel master control to increase the input level, and by connecting the non-
phase to the signal ground. The input can be congured as either a stereo input with six
stereo outputs or a mono input with six mono paired outputs. The XLR 3 pin input has the
following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
Stereo/Mono Operation
The mode of operation may be switched between a stereo distributed channel to 6 stereo
channels, or a mono channel to six mono paired outputs (i.e. the same signal to both ear
pieces), by the push button on the rear panel which is recessed to prevent accidental
switching.
Channel Insertion Inputs/Parallel Outputs
Each channel has an unbalanced override/insertion input via a ¼” stereo audio jack socket
on the rear panel, which overrides the master input.
Each connector can also be individually congured as a parallel output providing the same
signal as the output on the front of the unit. To congure the jack connector as an output,
you’ll need to alter some jumper settings inside the unit.
Removing the Equipment Covers
To get inside the RB-HD6, rst ensure that it has been disconnected from the mains power
and that the mains IEC lead to the unit has been removed. Observing anti-static precautions,
undo the four cross-head screws on the back panel at the far left and far right of the panel
(2 at each end). Also undo the small brass screws which hold the top and bottom panels to
the rear panel. The rear panel should slide backwards out of the unit together with the main
circuit board.
HEADPHONE DISTRIBUTION
AMPLIFIERS
Stereo
Inputs