Power Control Connections
Your amplifier features a built-in remote turn-on system that will automatically switch the amplifier on when another device in the system is switched on.
Remote Turn-On Using Products Equipped With a Low Voltage Trigger Jack
Press the front panel power switch on the amplifier so that it is in the ON position. Then, using an accessory cable with a 3.5mm mono mini-plug on each end, connect the trigger-output jack on the rear of the source device to the trigger input jack on the back panel of the amplifier. When these connections are made, the amplifier will automatically turn on whenever the triggering device is turned on.
Remote Turn-On
Using External AC to DC Power Converter
If your source device does not have a dedicated trigger jack, it is still possible to activate the unit for automatic turn on when a Switched Outlet is available on the rear of the source device. To control the amplifier in this fashion, you will need a small AC to DC power converter, capable of delivering a 3.3 to 24 volt DC signal. The DC voltage should terminate in a standard 3.5mm type mini plug. This type of converter may be obtained as a Power Adapter from many electronics retailers. When installing, press the Main Power Switch on the front panel of the amplifier in so that it is in the ON position. Plug the AC adapter into a switched outlet on the source device that will be activated when you wish to have the amplifier turn on. This may be the switched outlet at the rear of an AC receiver or other audio equipment. Connect the 3.5mm mini- plug from the adapter to the trigger-input jack on the back panel of the amplifier. The amplifier will now turn on and off automatically, based on the status of the controlling device.
AC Line Connector and Power Cord
Once all audio and system connections have been made, connect the supplied power cord to the amplifier first, and then connect it to an AC power source. Please make certain that the amplifier is turned off and that the device connected to the remote trigger input is off when connecting the power cord and plugging it into an AC outlet. Your amplifier is supplied with an internationally approved (IEC) power line connector that accepts the supplied detachable, high-current capacity power cord. NOTE: The power cord on the AT3000 series is supplied with a 20-amp plug that has a different prong configuration than the typical 15-amp plug. The AT3000 series amplifiers are so powerful they cannot reach their peak output from a 15-amp circuit. The power cords are designed specifically for 20-amp use, providing a more robust connection to the amplifier than a 15-amp cord can offer.
WARNING: Always turn off the amplifier and unplug the power cord before making any electrical connections.
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Plug the AT3000 into a 20-amp circuit only. You may find that your wall socket is not of the same configuration and will need to be changed in order to accept the 20-amp plug of the AT3000. 20-amp receptacles are inexpensive and can be found at any hardware or home supply store.
WARNING: DO NOT attempt this yourself, but hire a qualified electrician to make necessary changes. Under no circumstances should the round third prong on the plug be cut, bent or in any other way defeated as this may result in severe shock.
NOTE: It is not recommended that you connect other power amplifiers, or products with a high current draw, to the same AC power circuit as the amplifier. If this is unavoidable, the Ultra-Soft-Start circuitry of your amp will prevent excessively high inrush current.
Amplifier Operation
After all connections have been made you are ready for operation. First, turn on the source components and processor in your system. It is always a good idea to turn on your amplifier LAST. This avoids the possibility of any turn on pops or transients from other equipment being amplified and sent to your speakers where they may cause damage. Always start with a low volume level on your controller or preamp to avoid damage to your speakers.
Manual On
Simply press the front panel power switch to the “up” position. There will be a short pause from the time the power is turned on until power is applied to the speakers. This is intentional, and protects your speakers from damage while the amplifier stabilizes. To turn the unit off, press the Power button downward. The ON indicator light will go out and the STANDBY light will illuminate.
Automatic On
Make certain that the connection to the controlling device is correct. Whenever the controlling device is turned on, the amplifier will automatically turn on after a short pause. This pause is intentional, and it protects your speakers from damage while the amplifier stabilizes. You may also hear a relay click as during start up. This is also normal. To turn off your amplifier, simply turn off the device feeding the amplifier it’s audio signals. The amplifier will automatically go into a standby mode in a few moments.
Peak Indicator Light
This indicator circuit continually monitors the output level of your amplifier. This light will come on if the amplifier exceeds its maximum output capability on any channel. While this will not harm the amplifier, it does warn of potential harm to your loudspeakers if the light stays illuminated continuously for more than ten seconds. The volume setting from your preamp or source device must be turned down if this occurs.
