I was fortunate enough to acquire 6 Crown amps after an upgrade in the building I work with. I would like to control when thes babies come on through my 1050's 12 volt trigger. None of these have the trigger that I know of as yet. Thinking about using a 12 volt relay controling a contactor turning them off and on. The question I have is the 1050's trigger momentary or constant? TIA Jim