Connections; Inputs - MC2 Audio MC1250 Operating Instructions Manual

INSTALLATION: MECHANICAL
To ensure that this equipment performs to specification, it should be mounted in a suitable rack or
enclosure as described below. Like all high power amplifiers, it should be kept away from other
equipment which is sensitive to magnetic fields. Also, this amplifier may suffer a substantial reduction in
performance if it is subjected to, or mounted close to equipment which radiates high R.F. fields.
When mounting the amplifier in a rack or enclosure, ensure that :-
1. The rear of the unit is adequately supported. The brackets which are supplied fit standard 19 inch
(483mm) rack mounting systems. THE FRONT PANEL IS NOT CAPABLE OF SUPPORTING
THE UNIT ON ITS OWN.
2. THERE IS ADEQUATE VENTILATION. The cooling fans suck cool air in through the front air filter
and blow hot air out at the sides of the unit through the ventilating grills. IF THIS AIR IS NOT
ALLOWED TO ESCAPE, OVERHEATING WILL OCCUR. Take care when mounting other
equipment in the same rack. The air filter must be kept clean and free from dust. It is easily removed
by pulling it through the front. Dust can usually be shaken out, or if necessary the filter can be washed.

CONNECTIONS

INPUTS

The inputs are made via 2 separate 3 pin XLR connectors wired in parallel. Either socket can be used as
the input, the other one can be used to link to other amplifiers ('daisy chain') or to the other input for
mono signals.
They are electronically balanced and should be connected via a high grade twin core screened cable, as
follows:-
The amplifier is designed to operate with fully balanced equipment and ground loops or loss of
performance may be experienced if connected to unbalanced sources. If it is unavoidable however, the
following wiring should be used. The cable should still be twin core plus screen.
PIN1 - Screen - connected to the chassis of the unbalanced equipment - or left disconnected at the
unbalanced end.
PIN2 - Signal Hot
PIN3 - Signal Cold
The input requires a peak level of +6dBm for full output.
NOTE: This amplifier is wired to the latest industry recommendations. PIN1 is connected directly to
the chassis/mains earth. If ground loops (mains hum) are encountered remove the screen
connection from the other end of the cable and leave it open circuit. If problems persist,
consult your dealer/supplier, DO NOT TAMPER WITH OR ALTER ANY GROUND
(EARTH) CONNECTIONS INSIDE THE AMPLIFIER.
BRIDGED OPERATION
In Bridged mode input A is fed to both channels. Channel B will be out of phase with channel A.
PIN1 - Screen (see note)
PIN2 - Hot (signal +)
PIN3 - Cold (signal -)
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