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  1. Technical & Advanced Car Audio Discussion
    I have a 2020 Kia Optima SX with a stock 10 speaker 630 watt Harmon/Kardon sound system. For the most part other than some door panel rattle the sound system is fantastic, however I have noticed at volumes nearing 3/4 to max the subwoofer pops loudly and cuts out for an instant then resumes...
  2. Technical & Advanced Car Audio Discussion
    I already posted this in a different forum, but I have a 2020 Kia Optima SX with a stock 10 speaker 630 watt Harmon/Kardon sound system. For the most part other than some door panel rattle the sound system is fantastic, however I have noticed at volumes nearing 3/4 to max the subwoofer pops...
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