I used some spray foam to seal up the soundbar inside the narrow spot between the speaker and the light, then added dynamat and poly fill. Huge improvement.

There only gonna sound so good with the stock deck. I have a pioneer and it is worlds better than the factory deck.

 

These look like the DS line, correct? What adapter rings did you use for them. I've got the DS comp's for up front and the coax for the sound bar but I have to get adapter rings

 

Yep. DS line kickers. Found them for 45 buck a pair so I figured I would try them.
I just drilled new holes for them and used the supplied hardware. Also used some foam gasket tape to make sure they sealed up good.
Sealed up old hole with silicone also.