Handbook

Table Of Contents
50
Redbox User Handbook No 3
MICROP HONE AMPLIF IERS
& LIMITERS
MICROPHONE AMPLIFIERS & LIMITERS - RB-SL2
8
8 RB-SL2 Twin Mono, or Stereo, Limiter
Introduction
Fig 8-1: RB-SL2 Front Panel.
The RB-SL2 is a stereo, or twin independent mono, VCA limiter for use in news-rooms and
other locations where the correct level into recording equipment is required, but not
necessarily under the control of an engineer, for example, for overload protection. It can also
be used as an inexpensive main output limiter for low cost radio installations, RSL’s, hospital
and student radio.
The XLR-3 electronically balanced inputs and outputs can be wired unbalanced to accept an
output from domestic equipment. For each channel there is an input gain and a threshold
level control.
A rear panel switch changes the unit from dual mono to stereo, when only the pre-sets for
channel 1 (left) are active and apply to both channels. An LED power indicator on the front
panel displays the power supply connection.
System Block Diagram
Fig 8-2: RB-SL2 Block Diagram.
Gain and
Limit
Control
Select Stereo/Mono
Limiter
Stage
Limiter
Stage
Gain and
Limit
Control
Balanced
Professional
Output L
Balanced
Professional
Input L
Balanced
Professional
Input R
Balanced
Professional
Output R