operation;-
4 CHANNEL MODE. 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.
2 CHANNEL MODE. 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.
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)
AUDIO SENSE. 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 w i l l r e m a i n o n f o r a p e r i o d o f 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.
TRIGGER. 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.
CONSTANT. When the remote power switch is set in the CONSTANT position, the power on and off states of the AMC
