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  1. #1

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    Default DC Trigger to older equipment without jack; only wire buss

    Hey guys,
    I'd like to utilize the DC trigger feature on the Halo C2 and have it turn on a Parasound 2205A. Easy enough when both units have jacks for this, but in this case, only the processor has a jack, and the amp only has the wire buss.

    I thought I saw someone post about this a while ago, but I can't seem to find it in a forum search.

    1. what kind of cable do I use? stereo 3.5mm?
    2. presuming I snip one end off, how do I wire it to the buss?
    - msg

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    3.5mm mono cable, and depending on the cable type and manufacturer, when you snip one end, the positive could be the center wire, the red wire or the white wire (assuming the other wire is black).
    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
    I may have an addiction... RTA-15TL, SDA 2, LSi25, LSi15, LSi9, LSi7, LSiCx2, LSiFX, LS/FX, RT/FX, DSW MP2000...and that's just the Polks...

  3. #3

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    so can I just read those wires out with a multimeter with the processor powered up and the cable plugged in to determine which is which?
    - msg

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    That would be the best wat, just don't short them together.
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    Quote Originally Posted by zane77 View Post
    That would be the best wat, just don't short them together.
    meaning don't touch the wires together?
    can I still read across the pair directly to determine polarity?
    - msg

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    Yes...
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    Quote Originally Posted by msg View Post
    so can I just read those wires out with a multimeter with the processor powered up and the cable plugged in to determine which is which?
    Another (safer) option is to use the continuity setting on the multimeter. Connect one test lead probe to the tip of the jack and the other probe to each wire end. When you get a beep from the multimeter, that will indicate which wire is connected to the tip.
    Last edited by Glen B; 03-16-2014 at 03:38 PM.
    Main system: Denon DP-59L | Audio-Technica AT33EV | Marantz Reference Series SA-11S2 | Classé CP-50, modified | Classé CA-300, modified | Classé DR-10, modified | Classé RC-1 | PSB Stratus Gold i's | DIY Balanced AC Power Conditioner with surge/spike suppression | Acoustic Zen and NeoTech cables | Oyaide and Furutech AC power connectors and receptacles | Hi-Fi Tuning Supreme fuses | Dedicated 20A IG AC line

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    That makes sense. But how to determine what the tip sees from the processor?
    - msg

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    Just measure the voltage with your meter and be careful not to touch the leads or wires together, pretty simple.
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  10. #10

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    Quote Originally Posted by msg View Post
    That makes sense. But how to determine what the tip sees from the processor?
    Polarity is usually tip positive. If processor and amp manufacturers wired triggers any old way (some tip positive, some negative), equipment would not be compatible from one brand to the next. Otherwise, everyone who bought new gear would be running around like chickens with their heads cut off, trying to find out if their preamp/receiver and amp triggers were compatible.
    Main system: Denon DP-59L | Audio-Technica AT33EV | Marantz Reference Series SA-11S2 | Classé CP-50, modified | Classé CA-300, modified | Classé DR-10, modified | Classé RC-1 | PSB Stratus Gold i's | DIY Balanced AC Power Conditioner with surge/spike suppression | Acoustic Zen and NeoTech cables | Oyaide and Furutech AC power connectors and receptacles | Hi-Fi Tuning Supreme fuses | Dedicated 20A IG AC line

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    Do you use a power conditioner that has switched outlets? I am using a Monster HTS-3600II what has 110V AC trigger and 3-30V DC trigger to control some of the outlets including the power amp. In my cast, my preamp (Parasound C/PT-600) does not have a DC trigger out so I use one of the switched 110V AC outlets on back of the C/PT-600 preamp to trigger the power conditioner outlets to turn on the HCA-800II.
    Stan
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  12. #12

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    Quote Originally Posted by Glen B View Post
    Polarity is usually tip positive. If processor and amp manufacturers wired triggers any old way (some tip positive, some negative), equipment would not be compatible from one brand to the next. Otherwise, everyone who bought new gear would be running around like chickens with their heads cut off, trying to find out if their preamp/receiver and amp triggers were compatible.
    cool, thanks Glen.

    Quote Originally Posted by skrol View Post
    Do you use a power conditioner that has switched outlets? I am using a Monster HTS-3600II what has 110V AC trigger and 3-30V DC trigger to control some of the outlets including the power amp. In my cast, my preamp (Parasound C/PT-600) does not have a DC trigger out so I use one of the switched 110V AC outlets on back of the C/PT-600 preamp to trigger the power conditioner outlets to turn on the HCA-800II.
    Stan
    Hey Stan,
    yeah, I do, a refurbed Panamax something or other, and I'm using it right now, powering up/down with the power button that controls the switched outlets. ahhh, interesting idea - I do seem to recall that mine has DC trigger jacks on it, too, so I'll have a closer look to see whether I can control it in the way you're describing.
    - msg

  13. #13

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    I have a similar situation with the recent purchase of a Parasound HCA-1500A amp. My SC07 has a mini plug socket for the 12v trigger, the 1500A has a wire buss. But on the 1500A the two connections on the buss are labeled as "12v" and "ground". So if the tip of the plug is positive, then does that correlate to "12v" or "ground"? I have a 50/50 chance of connecting it right. Will either piece of equipment be damaged if I guess wrong???
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  14. #14

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    The tip is almost always positive, and the ring (lower part of the 3.5mm jack) being ground, if your not sure use a meter and check it, do not allow the wires to touch each other, to be truthful it's a very easy test
    There is no cure....
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