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Speakers Upgrade
I've done quite a few speaker/sound system jobs on lots of different cars and lately want to do some minor upgrades to my girlfriends system. She has the 08 328i with minimal sound system package.
The forum has a great DIY on replacing the actual speakers in the door but I haven't been able to find anything on using products such as Dynamat. I have seen results on cars such as my Honda, but the car came out of the factory with no sound isolation/cancellation material what so ever.
So far the package I'm looking at is Polk DB401 4-inch speakers and Polk DB1001 1-inch tweeters. Does anyone recommend replacing the subwoofers under the seats as well? Coincidentally this weekend I will be helping take apart a 325i's doors to do the exact same project.
tl;dr Will pieces of Dynamat in the door panel help sound quality? Does replacing the subwoofers help sound quality? Anything else simple I can do to make it sound its very best?
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