BEL DIGITAL AUDIO
BCR A4-4 OB
©
2017 BEL Digital Audio Ltd.
4
Introduction
The BCR A4-4 OB is a professional audio confidence monitor housed in a
reduced depth 1U rack. The unit features four amplifiers, four speakers and an
analogue line output.
The BCR A4-4 OB
will accept four pairs of analogue and four
pairs of AES3 audio inputs.
Front panel controls
Several controls and connectors are located on the front panel, Fig 1.1, from left to
right these are:
Balance/ Left level
In the stereo mode this control will adjust the balance between the left and right
speakers. In the two-channel mode this control will adjust the left speaker output level. The
mode can be selected by adjusting the links shown in Fig 1.3
Input selector
The audio input pair routed to the amplifiers and speakers can be selected using this
switch. The first four positions are analogue inputs and the last four AES inputs.
Input level indicators
Two LED bar graph PPI displays indicate the current input level.
AES lock indicators
Four LED indicators show the locked state of the four AES inputs.
Anti-phase indicator
A single LED will illuminate to indicate sustained anti-phase on the selected inputs.
Right level
This control adjusts the right speaker output level.
Headphone jack
A 6mm headphone jack is provided on the front panel. Inserting a jack plug will mute
the speakers.
Power on indicator
