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

imhififan Details Discussions Posts This discussion Message User 2,231 posts 01-01-2023 at 06:31pm Copy Comment URL Report Comment Edit Delete If the sources have 12V trigger output, you can use a relay controlled outlet for your subwoofer amp. https://www.adafruit.com/product/2935?gclid=EAIaIQobChMI8Zmxyvum_AIVgBXUAR1UAAuGEAQYAiABEgJM7vD_BwE
fuzztone Details Discussions Posts This discussion Message User 5,644 posts 01-01-2023 at 06:37pm Copy Comment URL Report Comment Edit Delete What part of no 12v is so incomprehensible? I've never seen a source with a trigger in that price range. And who would want a one source system? A Tricklestar strip will work. In my experience they are transparent.
imhififan Details Discussions Posts This discussion Message User 2,231 posts 01-02-2023 at 04:28pm Copy Comment URL Report Comment Edit Delete The Tricklestar strip is an excellent suggestion, it's a current sensing device. If you're looking for a ready to use 'box' audio signal sensing switch, check out the RDL ST-ACR1