I have two 15" Rockford Punch HE2s in my g3, they barely fit in there, i also have two 1200 watt amps. I'd have to say i've had no luck when it comes to vibration damping. The trunk rattles, i dynomatted it, the rear bumper rattles, i dynomatted that too, i did the license plate too. Everything still rattles, and since I installed a second amp you can see the rear door panels inflating on the outside of the car. The right front window rattles also if i turn the bass all the way up. Soon i'll break something. Maybe i'm just overdoing it but does anyone have problems with vibration in g3s.
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