The trigger and XLR functions can be a bit confusing in the sub woffer manual. The following information is what I learned from Axiom folks about ten months ago when I was adding the second 600. So unless they have changed the software since that time, this is how the triggers should work.
A siganl sent to the trigger
IN will fully turn the woffer on/off, this can be verified by the indicator light changing from green to red, or red to green. If one connects a trigger wire from the
OUT to the
IN on a second sub, then both will be controlled for the on/off operations.
As for an auto mode, my understanding at that time was the 500/600 do not have this function. They do however go into a low power usage mode after a period of time of not being active, using very little voltage, so leaving them on 24/7 is nothing to be concerned about.
Hope this helps clear up the questions.
