Manual
Table Of Contents
- Warranty
- Safety Information
- 1 RB-SS10 10 Way Stereo Analogue Source Selector/Mixer
- Technical Specifications RB-SS10
- 2 RB-DSS10 10 Way Stereo Digital Source Selector
- Technical Specifications RB-DSS10
- 3 RB-PMX4 10 Input, 4 Output Analogue Preset Mixer
- Technical Specifications RB-PMX4
- 4 RB-SSML1 Mic/Line Source Selector with Compressor Limiter
- Technical Specifications
- 5 RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers
- Technical Specifications RB-MA1 & RB-MA2
- 6 RB-DMA2 Dual Digital Microphone Amplifier
- Technical Specifications RB-DMA2
- 7 RB-ML2 Stereo Microphone & Line Level Limiter
- Technical Specifications RB-ML2
- 8 RB-SL2 Twin Mono, or Stereo, Limiter
- Technical Specifications RB-SL2
- 9 RB-SM1 Single & RB-SM2 Dual Stereo To Mono Converter
- Technical Specifications RB-SM1 & RB-SM2
- 10 RB-LC3 3 Way Light/Power Controller
- Technical Specifications RB-LC3
- 11 RB-MM1 Mix Minus Generator
- Technical Specification RB-MM1
- Fig A: Packing List.
- Fig B: Fuse Rating Table.
- Fig C: Mains Cable Wire Colours
- Fig D: Mains Lead Table.
- Fig E: RB-RK1Small Redbox Front Rack-mount Kit .
- Fig F: RB-RK2 Small Redbox Rear Rack-mount Kit.
- Fig G: RB-RK3 Large Redbox Rear Rack-mount Kit.
- Fig 1-1: RB-SS10 Front Panel.
- Fig 1-2: RB-SS10 System Block Diagram.
- Fig 1-3: RB-SS10 Front Panel.
- Fig 1-4: RB-SS10 Rear Panel.
- Fig 1-5: Analogue Audio Inputs Pin Connections
- Fig 1-6: Remote Start Pin Connections.
- Fig 1-7: Connection Example.
- Fig 1-8: Remote Select/Switch Input Connections.
- Fig 1-9: Connection Example.
- Fig 1-10: Status Output Pin Connections.
- Fig 1-11: Connection Example.
- Fig 2-1: RB-DSS10 Front Panel.
- Fig 2-2: RB-DSS10 System Block Diagram.
- Fig 2-3: RB-DSS10 Front Panel.
- Fig 2-4: RB-DSS10 Rear Panel.
- Fig 2-5: Digital Audio Inputs and S/PDIF Output Pin Connections.
- Fig 2-6: Remote Start Pin Connections.
- Fig 2-7: Connection Example.
- Fig 2-8: Remote Select/Switch Input Connections.
- Fig 2-9: Connection Example.
- Fig 2-10: Status Output Pin Connections.
- Fig 2-11: Connection Example.
- Fig 3-1: RB-PMX4 Front Panel .
- Fig 3-2: RB-PMX4 Block Diagram.
- Fig 3-3: RB-PMX4 Rear Panel.
- Fig 3-4: RB-PMX4 Front Panel Controls.
- Fig 4-1: RB-SSML1 Front Panel.
- Fig 4-2: RB-SSML1 Block Diagram.
- Fig 4-3: RB-SSML1 Rear Panel.
- Fig 4-4: DIP Switch to Control Mic & Meter Features.
- Fig 4-5: RB-SSML1 Front Panel.
- Fig 5-1: RB-MA1 & RB-MA2 Front Panel.
- Fig 5-2: RB-MA1 & RB-MA2 Block Diagram Single Channel.
- Fig 5-3: RB-MA1 Rear Panel.
- Fig 5-4: RB-MA2 Rear Panel.
- Fig 5-5: Switch to Control LF Filter and Phantom Power.
- Fig 6-1: RB-DMA2 Front Panel.
- Fig 6-2: RB-DMA2 System Block Diagram.
- Fig 6-3: RB-DMA2 Front Panel.
- Fig 6-4: Jumpers to Disable Fine Gain Control.
- Fig 6-5: RB-DMA2 Rear Panel.
- Fig 6-6: RB-DMA2 Status Select Switches.
- Fig 6-7: RB-DMA2 Frequency and Sync Rotary Switch Selections.
- Fig 7-1: RB-ML2 Front Panel.
- Fig 7-2: RB-ML2 Block Diagram.
- Fig 7-3: RB-ML2 Rear Panel.
- Fig 7-4: Switch to Control LF Filter and Phantom Power.
- Fig 8-1: RB-SL2 Front Panel.
- Fig 8-2: RB-SL2 Block Diagram.
- Fig 8-3: RB-SL2 Rear Panel.
- Fig 9-1: RB-SM1 & RB-SM2 Front Panel.
- Fig 9-2: RB-SM1 & RB-SM2 Block Diagram Single Channel.
- Fig 9-3: RB-SM1 Rear Panel..
- Fig 9-4: RB-SM2 Rear Panel.
- Fig 10-1: RB-LC3 Front Panel.
- Fig 10-2: RB-LC3 Block Diagram.
- Fig 10-3: RB-LC3 Rear Panel
- Fig 10-4: Output 1 Configuration Setting.
- Fig 10-5: Output 2 Configuration Settings.
- Fig 10-6: Output 3 Configuration Settings.
- Fig 11-1: RB-MM1 Front Panel.
- Fig 11-2: RB-MM1 System Block Diagram.
- Fig 11-3: RB-MM1 Rear Panel.
Redbox User Handbook No 3
47
MICROPHONE AMPLIFIERS & LIMITERS - RB-ML2
MICROPHONE AMPLIFIERS
& LIMITERS
7
Mic / Line Output Gain
The output gain is adjustable from -54dB to -24dB when mic is selected and adjustable
between -8dB to +22dB for line, with reference to 0dBu line input. The gain is adjusted via
two potentiometers on the rear panel of the unit, although it is pre-set in production.
Level Limiting
Stereo limiting operates by limiting both left and right outputs if either the left and right
input needs to be limited. Dual mono limiting operates by limiting left and right signals
individually.
The characteristics of the limiter can be set via level threshold pre-sets. For each channel
there is an input gain and a threshold level control. With the limit threshold set to maximum,
the input through to output can be normalised using the input potentiometers. Once the
unit is acting as a buffer with gain/attenuation, the limit threshold level can be set, with the
recovery adjusted for the application. The power LED indicates limiting by flashing.
Mode Select Switch
The mode switch changes the unit from dual mono to stereo mode. In stereo mode, only
the pre-sets for channel 1 (left) are active and they are applied to both channels. Stereo
limiting operates by limiting both left and right outputs if either left or right input needs to
be limited. Dual mono limiting operates by limiting left and right signals individually – you
can use the RB-ML2 as two separate mono limiters.