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Originally Posted by m4shifter
Read through the entire thread, amazing work!
Did the road noise cancellation somewhat worked out in the end?
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Thank you !
The sound damping did help a bit with road noise. Must go for another drive and measure. But biggest gain was in sub bass. The trunk doesn’t create rattles like it did so cleaned up the audio nicely.
Was also able to reduce bass gain by 3 db and still hit the audio target curve so effectively it’s doubled the power available on the sub bass. The mid bass drivers in the doors can be run to near power limits with no apparent rattles , buzzing or resonances.
I think to cut road noise further would require additional products like Resonix but what is done is a good compromise between good audio without killing off the sound of an M3.