Buzzing from sub?, I'm getting an annoying buzz with my new custom sealed box Options

[Noahwhite2014]

So I made a sealed box that takes up the inside of the spare tire well and has a false floor baffle flush with the rear seats in the down position. The volume on the interior is around 2.85 cubic feet and there is cushion foam lining the floor pan in the back. The whole box is bolted down to the spare tire tie down hole and that is also the ground point I'm using for the amp. Here's a picture of it.

Looks great and sounds great, but at certain frequencies I get a buzz from my plastics in the back. I believe it's also buzzing the bumper and license plate bezel (not the license plate itself since it has a rubber "anti vibration" frame.

Anyone have a good way to quiet that crap down? Lol

[Jmk91]

I know his amp isn't causing the real issue haha it was a joke
But I had a jl HD 1200.1 it puts.out 1200 RMS at 1-4 ohms if I recall correctly and I changed it out to a pioneer because I sold the HD 1200.1 on eBay and yes I could tell a huge huge difference in sound quality... the amp only amplifies the sound but how it does it makes a day and night difference. But who cares haha. You ever think that your box might be the issue? Your sub is firing up meaning the air pressure is bouncing off the bottom and basically off your trunk too.. This results in vibration to the entire rear end I'd think.. That would cause any plastic that attaches to rattle and make noise. You could switch out boxes to see.