AMC 2445a - Manual (Page 7)

operation;-
When the MODE
SWITCH of the 2445/2445a are set to 4
channel operation, simply connect the
wires from one loudspeaker to the
terminals (marked - and +) of CH1, the
second speaker to CH2 and so on. Make
sure that the red terminal on each
loudspeaker is connected to the
corresponding red terminal on the amplifier
and likewise for the blck terminals.
When the MODE
SWITCHES are set to 2 channel opreation,
only the red terminals on the 2445/2445a
areused. For this mode of opreation,
connect the red terminal of the right
speaker to the red terminal of CH1 and the
black speaker terminal to the red terminal
of CH2. The left speaker is connected in a
similar way, where the red terminal of the
speaker is connectored to the red terminal
of CH3 and the black terminal of the
speaker is connected to the red terminal of
CH4.
NOTE: The 2445 amplifier is normally used
in 2 or 4 channel modes. However, it can
also be set to operate as a 3 channel
amplifier that is capable of driving one 8
ohm loudspeaker at 90 watts and two 4
ohm loudspeakers at greater than 45 watts
per channel. Typical applications include,
satellite/subwoofer systems and Dolby
surround sound decoder systems. To set
the 2445/2445a in this mode of operation,
please consult your AMC dealer.
4 CHANNEL MODE.
2 CHANNEL MODE.
7. AUDIO SENSE/TRIGGER/CONSTANT
SWITCH
The remote power switch is located on the
back panel of the AMC 2445a and provides
the following functions; (note that this
feature is only valid for 2445a, please skip
to next part if your model is 2445)
When the remote power
switch is set in the AUDIO SENSE
position, the 2445a is turned on or off
automatically, depending on the audio
signal level at the inputs. With an audio
signal greater than 10 mV at any of the
four stereo inputs of 2445a, the amplifier
will automatically turn on. If the signal
level drops below this level, the amplifier
will remain on for a period of
approximately 5 minutes before it
automatically reverts to stand_by mode.
Please note that when AC power is first
applied to the 2445a while the remote
power switch is in the AUDIO SENSE
position, the amplifier will automatically
turn on, even without an audio signal
being present at any of the audio inputs.
However, after approximately 5 minutes,
the amplifier will revert to stand_by mode,
assuming no signals are present at any of
the inputs.
When the remote power
switch is set in the TRIGGER position,
the AMC 2445a can be turned on
automatically by an external trigger
voltage. The trigger voltage is applied to
the trigger input socket, located on the
back panel of the 2445a. This trigger
voltage can originate from a system
controller or from another 2445a. The
sensitivity of this input ranges from +3Vdc
to +30Vdc and will also accept AC
voltages over the same range. The
current required from the trigger source is
only 0.2mA.
The 2445a is also provided with a trigger
output socket, also located on the back
panel. When the 2445a is turned on, the
trigger output socket provides a +12Vdc
signal that can be looped through or
"daisy_chained" to the trigger input of
another 2445a amplifier (or other
component) in a multi component
installation. When the external trigger
voltage is set to 0V, the 2445a will be in
stand_by mode and the voltage from the
trigger output socket will likewise be 0V.
When the remote power
switch is set in the CONSTANT position,
the power on and off states of the AMC
AUDIO SENSE.
TRIGGER.
CONSTANT.