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Issue 2
Mitre Slave
120W 300W
The Mitre Slave is equipped with two 0dBM balanced line inputs incorporating a priority switching
system. The priority is selected using a two-way dual in line switch. Switch ‘1’ when selected ‘on’
provides input 2 muting when 1 is accessed. Switch ‘2’ when selected ‘off’ enables the first input
irrespective of access conditions. When both switches are selected ‘on’ input 1 will override input 2.
Therefore it is possible to have both inputs mixing together or cascade priority depending on the
requirements, refer to rear panel drawing.
LED indicators on the front panel show clearly which input or inputs are busy and the channel gain
may be individually set using the rear panel controls. The output stage is protected against overload
conditions, i.e. short circuits etc., by means of sensing the current and voltage and presenting this error
signal to a drive limiter circuit. Should the amplifier be subjected to an abnormal load the input to the
power amplifier is limited to a safe level.
Over temperature protection is provided using sensors attached to the output stage heatsink. Should
the temperature exceed 90
°
C the input signal is reduced to a low level preventing permanent damage
to the amplifier. When the amplifier cools down, it will perform as normal without manual resetting.
For added reliability the 300 Watt version includes internal fans that will operate if the heatsink
temperature exceeds 70°C.
The inputs to the amplifier are presented on two separate four-way plug-in screw terminal connectors,
each connector provides a balanced audio input, ground and access DC control input. The output is
presented on a three-way plug/screw termination connector providing 50V or 100V output.
The front panel LED indicators include an output level status indicator consisting of four LED’s
indicating 5V, 25V, 50V and 100V maximum output level.
