Stop Sub Rattles on Raptor 300mp

[rnkburg]

I have a 2012 Raptor 300mp with the factory sub installed. It makes the stereo sound much fuller, but it drives me insane. When it's on even at low volumes it vibrates the fuse box cover next to the sub. Makes it sound like a blown speaker. I can't leave the door open on the fuse box (helps alot) but would like to get better sound.

Has anyone messed with this, or found a neat way around it. I have thought about a different sub box put into where they have it located, but don't know how much air space is back there for a box. Dynamat maybe? Love to hear any suggestions.

Thanks