OK need a expert's advice

sonic370

i have a set of jvc component's just installed in my 09.
and they sound great. good highs and bass kicks go enough for me.
just one problem. sometimes i will get a slight rattle from the drivers side door
from the bass. but if i lower the window just a tad not much it stops.....

do i need to add some sound material inside the door. would that be the first
place to start. the window is going all the way up.