Rattling

Ever since I put in new speakers in my car the rear deck makes a rattling noise every time the bass hits. Anyone have any suggestions on how to stop this? When I push down on the top it seems to stop but when it just is sitting at its natural position it makes that annoying rattling sound any info would be appreciated, thanks.

[sofa]

it might not be the back deck it could be the weather stripping on the front side of the trunk. i just used sticky foam tape on the metal on the trunk lid so when it closes it stops that hard plastic poop from vibrating. maybe 2 sided tape on the rear deck if it that or dynomat?

i put sum foam under it till it couldnt move up and down and problem solved