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<blockquote data-quote="sundownz" data-source="post: 2822985" data-attributes="member: 549523">I had an SI Mag D2 12&quot; in a sealed box down in the tire well of my previous car, a 325i, and it slammed hard with exceptional SQ. The 12&quot; version of the Mag has very low stock but if you are interested I can make sure that you get one as SI is nearby.My next pick from the subs mentioned would probably be the FI Q. You need something with a solid x-max as you pretty much NEED high output to get much of any output in your cabin.No matter what you get I have some tips:First thing you need to do is remove the rear speakers and some of the factory rear-deck mass deadening to let some more sound into the cabin. BMW deadens these things like you wouldn&#039;t believe! The cosmetic portion of the rear deck may need some work to keep it from rattling as well -- I stuffed soft foam behind it to press it firmly against the bolts so the plastic around the bolts didn&#039;t rattle.Also, if you do not have the optional &quot;ski hole&quot; fold down middle seat thing... you should punch out the metal in that spot to let more bass into the cabin as well. It is perforated from the factory so you can get it out with a hammer and a big screw driver. Without those mods almost anything will be quiet in your cabin due to the exceptionally well deadened interior of a BMW.</blockquote>

[QUOTE="sundownz, post: 2822985, member: 549523"] I had an SI Mag D2 12" in a sealed box down in the tire well of my previous car, a 325i, and it slammed hard with exceptional SQ. The 12" version of the Mag has very low stock but if you are interested I can make sure that you get one as SI is nearby. My next pick from the subs mentioned would probably be the FI Q. You need something with a solid x-max as you pretty much NEED high output to get much of any output in your cabin. No matter what you get I have some tips: First thing you need to do is remove the rear speakers and some of the factory rear-deck mass deadening to let some more sound into the cabin. BMW deadens these things like you wouldn't believe! The cosmetic portion of the rear deck may need some work to keep it from rattling as well -- I stuffed soft foam behind it to press it firmly against the bolts so the plastic around the bolts didn't rattle. Also, if you do not have the optional "ski hole" fold down middle seat thing... you should punch out the metal in that spot to let more bass into the cabin as well. It is perforated from the factory so you can get it out with a hammer and a big screw driver. Without those mods almost anything will be quiet in your cabin due to the exceptionally well deadened interior of a BMW. [/QUOTE]

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