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      12-08-2018, 10:33 PM   #8
M5speed
Private First Class
United_States
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Drives: 2020 BMW M5
Join Date: Apr 2018
Location: Chicago, IL

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I tried putting a box in with a real strong amp and in addition to taking up too much space, I felt like it slowed the car down with the speaker and amp together weighing 75-100 lbs, plus in addition it was very difficult to get sound to pass into the car with the car being so sound proof.

My other thought would be to try to better on the under seat subwoofer I believe this car has, but that may be tough as the sub is already extremely well tuned for the system.

Im still not 100% sure there is a sub under the front seats, but thats what my audio guy told me.
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