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  1. Best highpass filter for minimum group delay?

    Technical & Advanced Car Audio Discussion
    Hi all, Just looking at which highpass filter (subsonic) I should use for my setup. Is Butterworth (2nd order) the best filter if you look at the amount of group delay added? I understand that depending on the frequency it does not matter, so it depends on where you put the filter (hz). Thanks...
  2. Fmod's as Tweeter Protection?

    System Design: Help Me Choose Equipment For My Car
    Greetings. I'll run active my tweeters (directly from the amplifier), and I'm looking into what would be the best way to protect them against a technical failure of my dsp (because of my amp does not have any integrated crossover). My installer tells me that I can not run them without some...
  3. Help with Alternator whine! BMW M5

    Technical & Advanced Car Audio Discussion
    Please help me diagnose and correct this alternator whine. I am somewhat of a noob, so please be gentle....... Car: 2001 BMW M5, battery is in the trunk Setup: Kenwood DNX9980HD (double din GPS, top of the line a year or so ago, recently bought used for a reputable person), JL HD900/5...
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