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  1. X3 E83 (2004 - 2010)
    I just purchased 4x Alpine SPS-410 speakers, which have arrived early. I am now eager to install this coming weekend, but I have not yet ordered speaker connectors (oops). I would like to keep the factory connector Could someone please confirm these are the correct parts to fabricate the...
  2. X3 E83 (2004 - 2010)
    Hi everybody. Brand new to the forum! I have used the search function and read the "stage 1 speaker upgrade" thread in its entirety, but have not seen the answer to this question: I know that the alpine sps-400 speakers fit in the x3 for sure, but has anyone tried the alpine sps-410? (There...
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