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RE: 12V Trigger Line Output Converter to Amp

Posted by Bpet (A) on May 28, 2018 at 06:41:33

In Reply to: RE: 12V Trigger Line Output Converter to Amp posted by Duster on May 27, 2018 at 16:30:38:

Thanks Duster. I just tried that, but it did not make a difference. After many unsuccessful attempts with the line level sensing, I'm back to the 12V trigger...turns out that, if I connect the Negative from the DC Source, the LOC2SL, and the 3.5mm plug heading to the Amp, and then the DC Source to the Input on the LOC2SL and the 12V output from the LOC2SL to the 3.5mm plug headingg to the Amp, it "kindof" works. When I turn the audio source on, the Amp does not turn on - BUT if I continue to increase the volume of the audio source, the Amp's LED starts to go from Red(standby) to flickery green...the higher I turn the volume, the more solid the green light, but it is still not enough to turn the amp on. I measured with a volt meter and it fluctuates between .2 and 1.1V. If I remove the ground from the 3.5mm plug and measure between that ground and the hot side of the plug, I get 6V, but it does not change whether the music source is on or off?

The source speaker output cable is approx. 60ft long, and then it goes into a volume controlled switchbox, and so maybe the signal is too weak at that point to allow the LOC2SL to use it's trigger function?

Found a PAC TR-4...I wonder if I connect this to the + speaker wire that is feeding the Switchbox, which should be a stronger signal than the wire exiting the LOC2SL? Any thoughts:
https://pac-audio.com/catalog/specialty-items/tr-4

Question on Grounding: So, with the TR-4, the input volts come from taping the speaker + wire...then the Ground would go to the car chassis - since I'm not using it in a car - I would think the Ground would be connected to the Negative wire on the DC Power Source - the positive wire on the DC power source connecting to the 12V Input on the TR-4. So the electricity flows from the speaker wire into the TR-4, but doesn't it have to make it back along the ground to the source of the positive signal in the speaker wire in order for a voltage to appear to the TR-4 sensor? (like the negative of one of the speaker wires?)...will I be completing the circuit if the ground wire of the TR-4 is the negative DC power source as opposed to a ground wire on the original source Amp inside the house? Or since all of my house wiring is eventually grounded together, I'm fine? I'm just wondering if that is where my problem lies: Namely, the positive charge to trip the trigger, does not flow back to complete the circuit....Maybe the ground wire from the TR-4 should be connected to the Negative speaker wire lead?

Edits: 05/28/18 05/28/18 05/28/18 05/28/18 05/28/18 05/28/18 05/28/18

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