Wisdom Audio Series SA-3 - Manual (Page 14)

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standby. Two such mini-jacks are provided to allow “daisy-chaining” of
this turn-on signal with other components, including additional amplifiers.
The remote trigger input will be operated by any positive-polarity DC
signal between 3–20 volts (only a few milliamps are required), with tip po-
larity as shown below:
Remote turn-on
tip polarity
+ –
Input Signal: 3-20 volts @ less than 10 mA
Output Signal: 12 volts @ 100 mA
The DC Trigger Input has priority over the front panel switch. Therefore, if
a trigger voltage is present at this input connector, the unit will be forced
on and the front panel switch will be ignored. When the voltage transi-
tions from high to low (off), the unit will go into standby.
When there is no voltage present at the trigger input (either because the
controlling device is not sending, or because the plug is removed), the
front panel switch will operate the SA-3 as you would expect.
The 12v Trigger Output jack is driven to a “high” state of 12 volts a few
seconds after the SA-3 is turned on, and can source as much as 100 mA
of current at 12 volts. This signal may be used in turn to control other
components, such as additional Wisdom Audio SA-series amplifiers.
Each Wisdom Audio component has a short delay built into its DC trigger
system to facilitate a staggered turn-on sequence.
Your Wisdom Audio dealer can help you take advantage of these design
features to maximize your system’s convenience and versatility.
4 AC Mains Input & Switch
A 20-ampere IEC standard power cord is used with the SA-3. A high qual-
ity 20-ampere AC mains cord is included with the product, although the
use of the standardized IEC receptacle means that you may easily substi-
tute another high quality AC mains cord if you wish.
Note due to the high current nature of the SA-3, it uses a 20-ampere
IEC receptacle and cord, rather than the more common 15-ampere
version, and it will not accept a 15-ampere cord. If you decide to
use an after-market power cord, it must employ the compatible 20-
ampere IEC connector.
Warning! Your new Wisdom Audio SA-3 has been safety-tested and is
designed for operation with a three-conductor power cord. Do not
defeat the “third pin” or earth ground of the AC power cord.
An AC mains switch is located above the power cord on the rear panel
of the SA-3. This switch may be used to disconnect the unit from the AC
mains without having to actually unplug the SA-3 from the wall outlet.