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      09-30-2014, 01:13 AM   #39
Wongway
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Drives: 328i xdrive
Join Date: Sep 2013
Location: Pittsburgh, PA

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Yeah, ideally, you'd want the tweeters and mids playing from 20k-300ish hz or so. The 8" woofer below the seats for 300hz to about 80hz, and the trunk sub from 80hz on down past 30hz.

The big problem I see is you may end up with a strange hole in your sound.

The Earthquakes reportedly don't sound very good past 120hz.
It takes some really high end 4" mids to play down to 120hz or so.
A good subwoofer should ideally only be playing from 80hz on down.

So I'm going to guess things will sound rather empty from 300hz to about 120hz.
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