Originally Posted by DjFreddyD
I am in the process of adding an Emotiva XPA-5 to my current AV7705 and Emotiva XPA-7. The two trigger outputs are as follows
AV7705 trigger out
Trigger 1 - to the Panamax M-5300 that triggers power to the two amplifiers
Trigger 2 - to the XPA-5 and out to the XPA-7
When everything is powered on the amplifiers turn off after a minute or two - went ahead powered them on via the button on the front of the amplifiers.
After the cabling was done I noticed that there was no audio at all - I went ahead and did a factory reset of the AV7705 and still no sound.
Unplugged all trigger connections and powered Emotiva Amplifiers manually and I now have audio and sound.
I went ahead reconfigured the wiring for the triggers.
Current Set Up now from the AV7705 trigger out
Trigger 1 - to the Emotiva XPA-7
Trigger 2 - to the Emotiva XPA-5, trigger out to the Panamax M-5300
This configuration is working now...........
Question: Is this because the 2 trigger outs are maxed out? Not enough voltage to trigger everything? (Comment: NO)
I have a ET-3 Trigger Expansion Module on order to help the 12V trigger voltage distribution. (Comment: It's your money, but you are wasting it.)
Have you read the AV7705 and the Emotiva manuals? If you read the AV7705 manual you will find that each trigger output is rated at 12V, 150mA.
If you read the specifications for the XPA-5 you will find that the trigger input is rated at 12V, 10mA required.
Since 150mA is greater than 10mA that means the AV7705 has plenty of output capability to drive the trigger. Not in the manual: The AV7705 has a very robust trigger circuit using MOSFET's as individual switches for each trigger output and an ample power supply.
The trigger outputs are voltage sources. The outputs maintain a fix voltage by supplying whatever current is required to maintain that voltage. You'll remember that since 150mA is much greater than 10mA, plenty of current is available.
You should also note that there is a lack of posts in this thread complaining about insufficient trigger output. There are likely other owners who use the triggers and even owners that use then with Emotiva amplifiers.
The Panamax unit requires a trigger 12V input, the current requirement isn't given, but the Panamax would have to have a completely incompetent design to require over 150mA.
If you read the Emotiva specifications you will learn that the trigger output of the Emotiva unit is a separate circuit from the trigger input. This means that only the trigger input needs to be driven by the AV7705, not any devices connected to the trigger output. The Emotiva trigger electronics drive that output.
Here are some thoughts for potential sources of problems:
There is a trigger input and trigger output port on the Emotiva amplifier. On most gear the ports would be just pass throughs and either port could be used for input and output. Emotiva has a better design, but it is possible the plug from an external trigger output into the Emotiva output which likely means the Emotiva trigger isn't activated. A cable plugged into the Emotiva input and then plugged into the input on another piece of equipment also doesn't work. All of this would be very easy to do. In other words, pilot error. This would be an easy mistake to make even if the difference between the trigger ports is known.
Trigger circuits are specified to use mono cables. Mono cables are typically shipped with equipment, but most aftermarket cables are stereo. Usually stereo cables work, and should work, but not always for some reason in some pieces of equipment. An easy way to avoid any unpredictable problems here is to use stereo-to-mono adapters. These are very low cost items from Monoprice. They made solid connections to cables so they are unlikely to be adding a potential source of failure.
Of course something could be broken.