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<blockquote data-quote="raverx3m" data-source="post: 6500752" data-attributes="member: 563973">thanks for the responce mang great info.i was actually looking to build a passive crosover( a bandpass to be precise)and have more questions1 how are the aftermarket 3 way systems designed? are all 3 drivers(hi,mid,bass) 8 ohm?if so then how are they wired to produce 4 ohm total at the crosover.2 im concerned about the midrange that i have(the OEM bmw)&nbsp; itsa 2.5&#039; driverthe reason i picked that is because its the only one that fits without modification.but i know nothing about it, and did not find any info online.im assuming its somewhere around 15-25w of power. but i have no idea what to use as far as crossover points.my personal thoughts were to makelowpass at 900hz for the woofer900hz-7500hz bandpass for the mid</blockquote>

[QUOTE="raverx3m, post: 6500752, member: 563973"] thanks for the responce mang great info. i was actually looking to build a passive crosover( a bandpass to be precise) and have more questions 1 how are the aftermarket 3 way systems designed? are all 3 drivers(hi,mid,bass) 8 ohm? if so then how are they wired to produce 4 ohm total at the crosover. 2 im concerned about the midrange that i have(the OEM bmw) itsa 2.5' driver the reason i picked that is because its the only one that fits without modification. but i know nothing about it, and did not find any info online. im assuming its somewhere around 15-25w of power. but i have no idea what to use as far as crossover points. my personal thoughts were to make lowpass at 900hz for the woofer 900hz-7500hz bandpass for the mid [/QUOTE]

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