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Thread: FAQ: Connecting your soundcard to a Volkswagen Monsoon Amp

  1. #61
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    Aug 2006
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    18
    o dear... well, that changes things. thanks for the tip - i guess i'll be installing a resistor.

    actually, what did you mean precisely about installing a resistor from Left Front to Ground. sorry - i'm a bit new to this stuff. (but I got this far, so i'm not useless). if you could just elaborate on the specifics on what should be done.

  2. #62
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    May 2007
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    What I had was a 2001 Jetta with the Monsoon system, but when I bought the vehicle the previous owner took the radio out. All I had was the OEM connector sitting there. I then obtained and installed a radio that claims to produce 50W for the speaker outputs. At this point my wiring harness was the typical purple wire connects to the other purple wire ect. I then ran into the problem where the amp wouldn't turn off.

    When I make my harnesses I typically use flat spade connectors to connect the radio harness with the harness that connects to the OEM connector. Because I did this, I was able to change my connections fairly easily. I ended up making a separate small harness with the resistor included in it, that I could connect and disconnect from my spade connections. But this extra harness was only because I was experimenting and thought I may need to take the harness apart.

    If I were to do it again, knowing what I know now, before I put the spades on the OEM connector, I would twist the resistor leads with the wires from the car side of the harness with LF- then crimp on the spade, I would take the other resistor lead and twist it with the gnd wire, then crimp on my spade. Then I'd heat shrink, electric tape or what ever, such that this resistor doesn't short with anything else like dash components. Once the spades were done, I would then connect it to the radio harness by pushing the spades together.

  3. #63
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    First i want to say thanks for the great write up.

    I had a few questions. I marked up your picture to clarify some thing i wasn't sure about. Also Is there anything else attached to the circuit board (or at least i think thats what the brown thing is)

    So this unit requires a power source to work? I am assuming that is just a DC jack? and you splice into somewhere in the cars power to put a male connector to plug into that to give the unit power?
    Attached Images Attached Images  

  4. #64
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    Aug 2006
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    The "What is this" - that's the 12V input from the car.

    The other thing is where the regulator goes, but it looks that is actually the heat sync ON the regulator. they don't come with heat syncs, that's extra...

    I didn't put one on mine...

  5. #65
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    Jul 2007
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    ok one more question. maybe a stupid one. I know once the unit is assembled there is an IN side and an OUT side. But what about the Ground loop Iso? does it matter which end you connect to?

  6. #66
    Maximum Bitrate kbyrd's Avatar
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    The isolator has no "direction" that I could tell. As far as I know it's just a DC filter. The only reason my whole circuit has a "direction is that the 5VDC has to be injected somewhere and you don't want it flowing back to your sound card.
    My worklog.
    Status: VM GTI sold, got out of the CarPC tinkering hobby, but I still think about getting back in.

  7. #67
    Constant Bitrate
    Join Date
    Nov 2006
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    to help others out, i have a crude wire diagram of how i did it




    it looks like



    for me anyways. on my box i have 6 in, for front rear and center. the center are the same as the front, and i don't use it, caused more problems.

    as for the power in, u do not have to have a + and a -, only the 5v to the - side of the front left channel is all you need.

  8. #68
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    Has anyone tried one of these?

  9. #69
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    Quote Originally Posted by psionyx View Post
    Has anyone tried one of these?
    I think something like that can only be used if keeping your stock HU.
    In order to turn your amp on you would still need some kind of voltage going in???

  10. #70
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    Sep 2007
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    So I there any problem with just running 5v from my m2 staight to FL-?

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