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Turn On Options Switch
For convenience, there are three ways the Model 2250 v.2 can be turned on and off:
• Manually, by pressing the Power button on the front panel.
• Automatically by Audio, when an audio signal is present at the audio Input jacks.
• Automatically by 12V, when a suitable trigger voltage is applied to the 12V input jack.
Note: When either automatic turn on option is selected
the front panel Power button is disabled so that power
on/off is determined solely by the triggering preamp,
receiver or active audio signal. Pushing the Power
button will not turn the amp on or off.
Manual Position
When the Turn On Options switch is in its Manual position the Model 2250 v.2 must be turned on and
off manually by pressing the Power button on its front panel every time you wish to use your audio
system.
Audio Position (Automatic on/off)
When the Turn On Options switch is set to one of the two Audio positions, the Model 2250 v.2 will be
turned on only when an audio signal is present at the L or R Input jacks. After the audio signals cease
the Model 2250 v.2 will remain on for about 8-10 minutes before shutting off. This prevents unintended
turn-off during pauses in your music or movies.
Note: When the Turn On Options switch is set to Audio the Model 2250 v.2 will turn itself on
immediately when you connect its AC cord, even without any audio signal present. This is normal
and another reason why all connections and settings should be made before connecting its AC
cord.
Quieter: This is the more sensitive setting and the amp will turn on automatically with a very low
level audio signal corresponding to about 1mV. In most cases this will be the preferred setting. If
for some reason the amp never turns off you may have some noise in your system that is false
triggering the automatic turn on circuit. In this case you should use the Louder setting.
Note: If you need the Model 2250 v.2 to turn on at an even lower volume level, simply turn
down its L and R Level controls. Try setting the level controls at 12 o’clock and see if
the volume level is low enough when the amp turns on.
Louder: This is the less sensitive setting and the amp will turn on automatically with a slightly
higher level audio signal corresponding to about 6mV. You should first try the Quieter setting. If for
some reason the amp never turns off when set to Quieter then you can use the Louder setting.
Note: If the Model 2250 v.2 is driving only passive subwoofer(s), surround or rear
channels you will achieve more consistent automatic turn on by using the 12V DC
trigger. At the beginning of most films the sub and surround levels are often lower
than the minimum level required by the Audio sensing circuit.
12V Position (Automatic on/off)
When the Turn On Options switch is set to its 12V position, the Model 2250 v.2 is turned on and off only
with an external +9 V to +12 V voltage from your preamp or AV Receiver. When the external voltage
ceases the Model 2250 v.2 will turn off within a few seconds. The 12V switch position disables the front
panel Power button.