C5-525 - JL Audio 5.25" Evo Series Component Speaker System
BMWs are renown for having less than stellar sound systems.  I have a 2002 530i and thought I had a good system although not bright sounding.  I changed the speakers in my 2013 Tacoma and realized my7 speakers lacked clear highs and midrange.  I replace the originals with the JL Audio C525s and heard a decent upgrade with clearer highs etc.  Also re[placed the rear door tweeter with the JL tweeters and now the highs are clear and precise.  A good decent improvement.