12v trigger is 12v trigger, regardless of manufacturer. It's no problem to use 12v trigger in a multi-brand system.
It's best practice to turn on the amp last. Some devices have a fixed or variable delay on the 12v trigger in. Most do not. If you use the pre/pro to send the turn-on trigger pulse to the amp, that should be plenty good enough.
It's best practice to turn on the amp last. Some devices have a fixed or variable delay on the 12v trigger in. Most do not. If you use the pre/pro to send the turn-on trigger pulse to the amp, that should be plenty good enough.