Manual

Table Of Contents

Reference Monitors User Handbook

REFERENCE MONITORS RM-4C8

Note that the application of extra input gain reduces the maximum signal level permitted

before signal clipping occurs. The front panel CLIP indicator illuminates at the onset of

clipping, with extended illumination indicating that the input gain should be reduced and/

or the input signal levels attenuated.

Audio Inputs

Three-pin female XLR connectors are provided for the connection of up to eight balanced

audio Sources in two Banks (A and B) of four. The pin assignations are as follows:

Pin 1: Ground

Pin 2: In-phase signal (“hot”)

Pin 3: Out-of-phase signal (“cold”)

Unbalanced signals may also be used by linking pins 1 and 3 and applying the unbalanced

signal to pin 2.

Each Source input accepts an analogue line-level signal, which may be a complete

monophonic signal or one half of a stereo pair. Two of the four XLRs in each Bank also

accept AES/EBU digital signals, the two channels of which are automatically routed to a pair

of Source channels as per the connector labelling.

The RM-4C8 automatically detects digital input signals and seamlessly presents them

for selection in exactly the same way as analogue ones; the inputs may therefore be

any mixture of analogue and digital Sources. A full-scale digital input signal (0dBFS)

corresponds to the maximum analogue input signal level of +18dBu (with no extra input

gain applied).

Line Level Audio Outputs

A pair of three-pin male XLR connectors provides a stereo line-level audio output carrying

the selected audio Source signals. The XLR pin assignations are as follows:

Pin 1: Ground

Pin 2: In-phase signal (“hot”)

Pin 3: Out-of-phase signal (“cold”)

The signals may be unbalanced without loss of level by linking pins 1 and 3 and taking the

unbalanced signal from pin 2.

The line-level outputs may be congured either as analogue (using both output XLRs)

or AES/EBU digital (attach to the left-hand XLR of the pair and leave the right-hand XLR

unconnected). The selection of format is determined by the setting of switches 1-4 in Block

1 of the conguration switches (see Fig 2-6), according to the following table. Switch 5 in

the same block determines whether the line-level outputs are xed in level or proportional

in level to the setting of the volume control. Power should be removed from the unit while

making changes to the conguration switches and reapplied once the changes

are complete.