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distortion help

  1. Help! Distortion problem with new setup.

    General Car Audio Discussion
    As the voltage increases for the truck the distortion and static increases also. I have no idea why and I just got back from an audio shop and they told me that I had bad preamps from my head unit (alpine cda105) Is this possible? If I unplug the RCA's from the amp, the static goes away. If it...