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  1. Jehnert Double or Quadruple custom doorboard?

    System Design: Help Me Choose Equipment For My Car
    I am looking at a double or quadruple custom doorboard from Jehnert for my 2001 BMW 330i sedan. Refer to www . jehnert.de Here are my questions for those who have experience with this line. Does the quadruple system sound better than the double? How so? Does the quad system sound balanced...
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