Audio signal sensing auto on/off switch

I want to power my sub with external amps (have Behringer and QSC on hand). Both do NOT have a 12V or "signal sensing auto on/off".

I can only find circuit boards from China or Israel, and both take weeks/months.

I would assume that there is some DIY kit or ready to use 'box' available here in the US that offers this basic function. But can't seem to find one.

kraftwerkturbo01-01-2023 3:28pm

kraftwerkturbo OP Details Discussions Posts This discussion Message User 320 posts 01-03-2023 at 07:16pm Copy Comment URL Report Comment Edit Delete Good idea (to use the existing 'load sensing' power strip to control a heavy duty power relay (assuming that the big amp will melt the strip/contacts).
kraftwerkturbo OP Details Discussions Posts This discussion Message User 320 posts 01-04-2023 at 12:15am Copy Comment URL Report Comment Edit Delete Sure this box can use 12DV trigger, not just a digital input?
imhififan Details Discussions Posts This discussion Message User 2,181 posts 01-04-2023 at 03:32am Copy Comment URL Report Comment Edit Delete Sure this box can use 12DV trigger, not just a digital input? Yes, I can confirm that this box can be controlled with 12VDC. I have one, what you need to do is connect the green plug to the 12V trigger output.