Handbook

Table Of Contents
26
Redbox User Handbook No 3
MIXER & SOURCE SELECTORS
The metering is carried out after the compressor/limiter section and consists of two rows
of 12 round LEDs showing levels between -17dB and +11dB. An internal jumper allows the
metering to follow either the stereo output, or the headphone monitor outputs and a rear
panel DIPswitch can disable the peak hold display.
The XLR-3 stereo line output can be fed from either the mic or line input, but not the stereo
monitor input. The line output is electronically balanced and can be wired unbalanced
by grounding the non-phase signal, allowing you to feed both balanced and unbalanced
equipment. A pushbutton switch is provided to reduce the output by 10dB for this purpose.
The headphone output volume control is on the front panel. Each headphone output is
designed to drive 150 mW into 32Ω to 600Ω stereo headphones.
An LED power indicator on the front panel displays the power supply connection.
System Block Diagram
Fig 4-2: RB-SSML1 Block Diagram.
Rear Panel Connections
Fig 4-3: RB-SSML1 Rear Panel.
M
M
Phantom
Power (48V)
Phantom
On/Off
L.F. Filter
In/Out
L.F. Filter
Mic.
Volume
Gain
Fixed
Gain
Analogue
Switch
Compression
Threshold
Mic
Fixed Gain
Fixed Gain
Fixed Gain
Fixed Gain
Stereo
Monitor
Stereo
Line
L
Line Volume L
Line Volume R
Line Volume L
Line Volume R
R
L
R
Fixed
Gain
Compressor
Controls
Jumper
Jumper
Audio Output
Amplifier
Volume
Stereo Jack
Output
Stereo Jack
Output
LED Level
Meter Drivers
Peak
Hold
On/Off
Stereo
Output
Stereo
Monitor
Inputs
Stereo Line
Inputs
Stereo
Outputs
Monitor
Gain Pad
Option
Switches
Stereo Line
Gain Pad
Stereo Output
Gain Pad
Monitor
Volume
Mic
Input
Mic
Gain
MIXER & SOURCE SELECTORS - RB-SSML1
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