Crest Audio XRM - 12

Front panel features

The XRM master section contains the controls and indicators for the Solo system,headphone and Monitor

system,and Mix Master outputs.This section allows the operator to control the overall operation of the mixer.

A BNC lamp connector,supplied with +12 volts,is also located within this section. Each individual sub-system

will be described in detail.

Solo System

The XRM is equipped with a Stereo Solo System.Input channels (Mono or Stereo) are monitored

Pre-Fader (PFL),and Outputs are monitored After-Fader (AFL).Even though the Solo System itself is

stereo,not all monitored points are stereo sources.In those cases, the source appears in the Solo

System as a mono signal and appears equally on both meters and is present on both sides (L & R) of

the headphone and Monitor outputs.

Mono sources include:

A) Mono Input channels 1 thru 12,

B) Mix Outputs 1 thru 12 : IF the corresponding STRPAIR switch is NOT depressed.

Stereo sources include:

A) Stereo Input channels S1 thru S4 (NOTE:The PFL monitoring point is after the SUM INPUTS

switch,so a Stereo channel will solo as mono (it really is) if the switch is depressed.

B) Mix Output Pairs 1-2 thru 11-12 :IF the corresponding STR PAIR switch IS depressed.Either AFL

switch (odd or even) will trigger the Solo system,and both LED indicators will show Red.

The Solo System is additive.ANY and ALL sources that have their corresponding solo switches

pressed (PFL or AFL) will be mixed together.The resulting mixed signal will be displayed on the

meters and heard in the phones and monitor system.

Headphone jack (PHONES)

This 1/4” TRS jack is intended for use with stereo headphones.Any signals that are present in

the Solo System can be monitored here.When nothing is solo’d,the output is off.Although capable of

driving low impedance headphones ( 8Ω),best results (maximum output) are obtained with medium

impedance phones (30Ωto 75Ωtypes).

Headphone/Monitor Level Control

This knob controls the amount of Solo audio fed to the Headphones and also to the rear-panel

Monitor Out jacks.If no Solo is active, both outputs are OFF (no signal).In most cases, the operator

will use headphones to monitor the signals within the XRM,however,there are certain situations

where additional monitoring is needed.A cue wedge may need to be set up,or the solo audio may

need to be fed to a remote monitoring location;the Monitor Out jacks are available for this purpose.

SPEAKERS ON

This switch activates the rear-panel Monitor Out jacks..

Monitor Out jacks are muted (OFF).

Solo audio (controlled by the above Level control) can feed the Monitor Out jacks.

SOLO Meters (L & R)

These 12-segment LED ladders show the audio level of the Solo system.When nothing is being solo’d,

the meters are off.The meters have a “VU Type” response,they smooth-out the signal and display an

average of the audio level.

SOLO (ON)

This Red LED will illuminate when any solo switch is depressed.

PWR

This Green LED illuminates when the XRM is powered on.

Master section 3

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