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Thread: Audio problems

  1. #1
    Newbie
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    May 2005
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    Audio problems

    I installed a Mac Mini in my Jeep, and when I plug it into the aux input i get low volume and really bad interference. Strange, works fine in the house... Any idea? Maybe a grounding problem?

  2. #2
    Maximum Bitrate shizzle's Avatar
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    Mar 2005
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    Sarasota, FL
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    Either a ground loop or power interference. If moving the audio cable away from the power doesnt fix it, try a ground loop isolator from radiohack.
    Carputer status: [-*---------]
    Im thinking laptop...

  3. #3
    Low Bitrate
    Join Date
    Feb 2005
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    109
    Are you using an inverter?

    I installed mine and had the same buzz/low volume w/ an inverter. Tried grounding the case, didn't work. Ran an extension cord and plugged it into the wall. Problem solved. I'm hoping the DC power supply solves this problem.

  4. #4
    Variable Bitrate
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    Nov 2004
    Location
    NYC
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    I'm using an inverter and when first installing my CarPC, I had really bad ground loop noise whenever the inverter was turned on, the computer's PS was plugged INTO the inverter AND I had the AUX line as the source on my HU. If I disconnected the PSU from the inverter, the sound would go away.

    Solution: I bought a 3-to-2 prong outlet adapter and ran a wire from the neutral prong to the chassis.

    What's the voltage on the Mini's audio out?

  5. #5
    Low Bitrate
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    Feb 2005
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    109
    Inverters just suck.

  6. #6
    Maximum Bitrate shizzle's Avatar
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    Mar 2005
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    I have been running my mac mini off an inverter for weeks, and only had noise when the audio cable neared the power cable during reorganization. Maybe my inverter just doesn't suck as much. I do, however, recommend getting the p1900 and doing a proper wiring and grounding...
    http://www.mp3car.com/store/product_...products_id=94
    Carputer status: [-*---------]
    Im thinking laptop...

  7. #7
    Low Bitrate FireAnt's Avatar
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    May 2004
    Location
    Houston, Texas
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    I'm using the p1900 and have no ground noise problems at all. Also have no noise problems with the motor running. I couldn't be happier. My stock Head unit has Auxillary In and it also has a gain control for Aux in. I set mine at 5.

    Mike F.
    05 MINI Cooper Cabrio "Mac MINI"
    progress 95%- Mac Mini, Lilliput 7" , usb-wifi, Rayming GPS, Route 66,easy cat touch pad, CCAR front end"skinned",P1900 power supply

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